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	diff --git a/nepomuk/core/resourcedata.cpp b/nepomuk/core/resourcedata.cpp
	index 043f363f50..e38e418a06 100644
	--- a/nepomuk/core/resourcedata.cpp
	+++ b/nepomuk/core/resourcedata.cpp
	@@ -1,750 +1,758 @@
	/*
	* This file is part of the Nepomuk KDE project.
	* Copyright (C) 2006-2010 Sebastian Trueg <trueg@kde.org>
	* Copyright (C) 2010 Vishesh Handa <handa.vish@gmail.com>
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Library General Public
	* License as published by the Free Software Foundation; either
	* version 2 of the License, or (at your option) any later version.
	*
	* This library is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Library General Public License for more details.
	*
	* You should have received a copy of the GNU Library General Public License
	* along with this library; see the file COPYING.LIB. If not, write to
	* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
	* Boston, MA 02110-1301, USA.
	*/

	#include "resourcedata.h"
	#include "resourcemanager.h"
	#include "resourcemanager_p.h"
	#include "resource.h"
	#include "tools.h"
	#include "nie.h"
	#include "nfo.h"
	#include "pimo.h"
	#include "nepomukmainmodel.h"
	#include "dbusconnectionpool.h"
	#include "class.h"
	#include "dbustypes.h"

	#include <Soprano/Statement>
	#include <Soprano/StatementIterator>
	#include <Soprano/QueryResultIterator>
	#include <Soprano/Model>
	#include <Soprano/Vocabulary/RDFS>
	#include <Soprano/Vocabulary/RDF>
	#include <Soprano/Vocabulary/Xesam>
	#include <Soprano/Vocabulary/NAO>

	#include <QtCore/QFile>
	#include <QtCore/QDateTime>
	#include <QtCore/QMutexLocker>
	#include <QtDBus/QDBusConnection>
	#include <QtDBus/QDBusInterface>
	#include <QtDBus/QDBusReply>

	#include <kdebug.h>
	#include <kurl.h>
	#include <kcomponentdata.h>

	using namespace Soprano;

	#define MAINMODEL (m_rm->m_manager->mainModel())


	Nepomuk::ResourceData::ResourceData( const QUrl& uri, const QUrl& kickOffUri, const QUrl& type, ResourceManagerPrivate* rm )
	: m_uri(uri),
	m_mainType( type ),
	m_modificationMutex(QMutex::Recursive),
	m_cacheDirty(true),
	m_pimoThing(0),
	m_groundingOccurence(0),
	m_rm(rm)
	{
	if( m_mainType.isEmpty() ) {
	m_mainType = Soprano::Vocabulary::RDFS::Resource();
	}

	m_types << m_mainType;

	if( m_rm->dataCacheFull() )
	m_rm->cleanupCache();

	m_rm->dataCnt.ref();

	if( !uri.isEmpty() ) {
	m_kickoffUris.insert( uri );
	}
	if( !kickOffUri.isEmpty() ) {
	m_kickoffUris.insert( kickOffUri );
	}
	m_rm->addToKickOffList( this, m_kickoffUris );
	}


	Nepomuk::ResourceData::~ResourceData()
	{
	resetAll(true);
	m_rm->dataCnt.deref();
	}


	bool Nepomuk::ResourceData::isFile()
	{
	return( m_uri.scheme() == QLatin1String("file") \|\|
	m_nieUrl.scheme() == QLatin1String("file") \|\|
	(!m_kickoffUris.isEmpty() && (*m_kickoffUris.begin()).scheme() == QLatin1String("file")) \|\|
	constHasType( Soprano::Vocabulary::Xesam::File() ) \|\|
	constHasType( Nepomuk::Vocabulary::NFO::FileDataObject() ) );
	}


	QUrl Nepomuk::ResourceData::uri() const
	{
	return m_uri;
	}


	QUrl Nepomuk::ResourceData::type()
	{
	load();
	return m_mainType;
	}


	QList<QUrl> Nepomuk::ResourceData::allTypes()
	{
	load();
	return m_types;
	}


	void Nepomuk::ResourceData::setTypes( const QList<QUrl>& types )
	{
	store();

	QMutexLocker lock(&m_modificationMutex);

	// reset types
	m_types.clear();
	m_mainType = Soprano::Vocabulary::RDFS::Resource();

	QList<Node> nodes;
	// load types (and set maintype)
	foreach( const QUrl& url, types ) {
	loadType( url );
	nodes << Node( url );
	}

	// update the data store
	setProperty(Soprano::Vocabulary::RDF::type(), Nepomuk::Variant(types) );
	}



	void Nepomuk::ResourceData::resetAll( bool isDelete )
	{
	// remove us from all caches (store() will re-insert us later if necessary)
	m_rm->mutex.lock();
	if( !m_uri.isEmpty() )
	m_rm->m_initializedData.remove( m_uri );
	Q_FOREACH( const KUrl& uri, m_kickoffUris )
	m_rm->m_uriKickoffData.remove( uri );
	m_rm->mutex.unlock();

	// reset all variables
	m_uri = QUrl();
	m_nieUrl = KUrl();
	m_kickoffUris.clear();
	m_cache.clear();
	m_cacheDirty = false;
	m_types.clear();
	delete m_pimoThing;
	m_pimoThing = 0;
	m_groundingOccurence = 0;

	// when we are being deleted the value of m_mainType is not important
	// anymore. Also since ResourceManager is a global static it might be
	// deleted after the global static behind Soprano::Vocabulary::RDFS
	// which results in a crash.
	if( !isDelete )
	m_mainType = Soprano::Vocabulary::RDFS::Resource();
	}


	QHash<QUrl, Nepomuk::Variant> Nepomuk::ResourceData::allProperties()
	{
	load();
	return m_cache;
	}


	bool Nepomuk::ResourceData::hasProperty( const QUrl& uri )
	{
	load();
	QHash<QUrl, Variant>::const_iterator it = m_cache.constFind( uri );
	if( it == m_cache.constEnd() )
	return false;

	return true;
	}


	bool Nepomuk::ResourceData::hasProperty( const QUrl& p, const Variant& v )
	{
	QHash<QUrl, Variant>::const_iterator it = m_cache.constFind( p );
	if( it == m_cache.constEnd() )
	return false;

	QList<Variant> thisVals = it.value().toVariantList();
	QList<Variant> vals = v.toVariantList();
	Q_FOREACH( const Variant& val, vals ) {
	if( !thisVals.contains(val) )
	return false;
	}
	return true;
	}


	bool Nepomuk::ResourceData::hasType( const QUrl& uri )
	{
	load();
	return constHasType( uri );
	}


	bool Nepomuk::ResourceData::constHasType( const QUrl& uri ) const
	{
	// we need to protect the reading, too. setTypes may be triggered from another thread
	QMutexLocker lock(&m_modificationMutex);

	Types::Class requestedType( uri );
	for ( QList<QUrl>::const_iterator it = m_types.constBegin();
	it != m_types.constEnd(); ++it ) {
	Types::Class availType( *it );
	if ( availType == requestedType \|\|
	availType.isSubClassOf( requestedType ) ) {
	return true;
	}
	}
	return false;
	}


	Nepomuk::Variant Nepomuk::ResourceData::property( const QUrl& uri )
	{
	load();

	// we need to protect the reading, too. load my be triggered from another thread's
	// connection to a Soprano statement signal
	QMutexLocker lock(&m_modificationMutex);

	QHash<QUrl, Variant>::const_iterator it = m_cache.constFind( uri );
	if ( it == m_cache.constEnd() ) {
	return Variant();
	}
	else {
	return *it;
	}
	}


	bool Nepomuk::ResourceData::store()
	{
	QMutexLocker lock(&m_modificationMutex);

	if ( m_uri.isEmpty() ) {
	QMutexLocker rmlock(&m_rm->mutex);

	if ( m_nieUrl.isValid() &&
	m_nieUrl.isLocalFile() &&
	m_mainType == Soprano::Vocabulary::RDFS::Resource() ) {
	m_mainType = Nepomuk::Vocabulary::NFO::FileDataObject();
	m_types << m_mainType;
	}

	QDBusConnection bus = QDBusConnection::sessionBus();
	QDBusMessage msg = QDBusMessage::createMethodCall( QLatin1String("org.kde.nepomuk.DataManagement"),
	QLatin1String("/datamanagement"),
	QLatin1String("org.kde.nepomuk.DataManagement"),
	QLatin1String("createResource") );
	QString app = KGlobal::mainComponent().componentName();
	QVariantList arguments;

	//FIXME: Maybe we should be setting the 'label' over here.
	arguments << DBus::convertUriList(m_types) << QString() << QString() << app;
	msg.setArguments( arguments );

	QDBusMessage reply = bus.call( msg );
	if( reply.type() == QDBusMessage::ErrorMessage ) {
	//TODO: Set the error somehow
	kWarning() << reply.errorMessage();
	return false;
	}
	else if( reply.type() == QDBusMessage::ReplyMessage ) {
	m_uri = reply.arguments().at(0).toUrl();
	}

	// Add us to the initialized data, i.e. make us "valid"
	m_rm->m_initializedData.insert( m_uri, this );

	// each initialized resource has to be in a kickoff list
	// thus, we make sure that is the case.
	if( m_kickoffUris.isEmpty() ) {
	m_kickoffUris.insert( m_uri );
	m_rm->addToKickOffList( this, m_kickoffUris );
	}

	// store our grounding occurrence in case we are a thing created by the pimoThing() method
	if( m_groundingOccurence ) {
	if( m_groundingOccurence != this )
	m_groundingOccurence->store();
	setProperty(Vocabulary::PIMO::groundingOccurrence(), Variant(m_groundingOccurence->uri()) );
	}

	foreach( const KUrl& url, m_kickoffUris ) {
	if( url.scheme().isEmpty() )
	setProperty( Soprano::Vocabulary::NAO::identifier(), Variant(url.url()) );
	else
	setProperty( Nepomuk::Vocabulary::NIE::url(), Variant(url.url()) );
	}
	}

	return true;
	}


	void Nepomuk::ResourceData::loadType( const QUrl& storedType )
	{
	if ( !m_types.contains( storedType ) ) {
	m_types << storedType;
	}
	if ( m_mainType == Soprano::Vocabulary::RDFS::Resource() ) {
	Q_ASSERT( !storedType.isEmpty() );
	m_mainType = storedType;
	}
	else {
	Types::Class currentTypeClass = m_mainType;
	Types::Class storedTypeClass = storedType;

	// Keep the type that is further down the hierarchy
	if ( storedTypeClass.isSubClassOf( currentTypeClass ) ) {
	m_mainType = storedTypeClass.uri();
	}
	else {
	// This is a little convenience hack since the user is most likely
	// more interested in the file content than the actual file
	Types::Class xesamContentClass( Soprano::Vocabulary::Xesam::Content() );
	if ( m_mainType == Soprano::Vocabulary::Xesam::File() &&
	( storedTypeClass == xesamContentClass \|\|
	storedTypeClass.isSubClassOf( xesamContentClass ) ) ) {
	m_mainType = storedTypeClass.uri();
	}
	else {
	// the same is true for nie:DataObject vs. nie:InformationElement
	Types::Class nieInformationElementClass( Vocabulary::NIE::InformationElement() );
	Types::Class nieDataObjectClass( Vocabulary::NIE::DataObject() );
	if( ( currentTypeClass == nieDataObjectClass \|\|
	currentTypeClass.isSubClassOf( nieDataObjectClass ) ) &&
	( storedTypeClass == nieInformationElementClass \|\|
	storedTypeClass.isSubClassOf( nieInformationElementClass ) ) ) {
	m_mainType = storedTypeClass.uri();
	}
	}
	}
	}
	}


	bool Nepomuk::ResourceData::load()
	{
	QMutexLocker lock(&m_modificationMutex);

	if ( m_cacheDirty ) {
	m_cache.clear();

	if ( m_uri.isValid() ) {
	//
	// We exclude properties that are part of the inference graph
	// It would only pollute the user interface
	//
	Soprano::QueryResultIterator it = MAINMODEL->executeQuery(QString("select distinct ?p ?o where { "
	"graph ?g { %1 ?p ?o . } . FILTER(?g!=<urn:crappyinference2:inferredtriples>) . "
	"}").arg(Soprano::Node::resourceToN3(m_uri)),
	Soprano::Query::QueryLanguageSparql);
	while ( it.next() ) {
	QUrl p = it["p"].uri();
	Soprano::Node o = it["o"];
	if ( p == Soprano::Vocabulary::RDF::type() ) {
	if ( o.isResource() ) {
	loadType( o.uri() );
	}
	}
	else {
	Nepomuk::Variant var = Variant::fromNode( o );
	updateKickOffLists( p, var );
	m_cache[p].append( var );
	}
	}

	m_cacheDirty = false;

	delete m_pimoThing;
	m_pimoThing = 0;
	if( hasType( Vocabulary::PIMO::Thing() ) ) {
	m_pimoThing = new Thing( m_uri );
	}
	else {
	// TODO: somehow handle pimo:referencingOccurrence and pimo:occurrence
	QueryResultIterator pimoIt = MAINMODEL->executeQuery( QString( "select ?r where { ?r <%1> <%2> . }")
	.arg( Vocabulary::PIMO::groundingOccurrence().toString() )
	.arg( QString::fromAscii( m_uri.toEncoded() ) ),
	Soprano::Query::QueryLanguageSparql );
	if( pimoIt.next() ) {
	m_pimoThing = new Thing( pimoIt.binding("r").uri() );
	}
	}

	return true;
	}
	else {
	return false;
	}
	}
	else {
	return true;
	}
	}


	void Nepomuk::ResourceData::setProperty( const QUrl& uri, const Nepomuk::Variant& value )
	{
	Q_ASSERT( uri.isValid() );

	if( store() ) {
	// step 0: make sure this resource is in the store
	QMutexLocker lock(&m_modificationMutex);

	// make sure resource values are in the store
	if ( value.simpleType() == qMetaTypeId<Resource>() ) {
	QList<Resource> l = value.toResourceList();
	for( QList<Resource>::iterator resIt = l.begin(); resIt != l.end(); ++resIt ) {
	resIt->m_data->store();
	}
	}

	// update the store
	QDBusConnection bus = QDBusConnection::sessionBus();
	QDBusMessage msg = QDBusMessage::createMethodCall( QLatin1String("org.kde.nepomuk.DataManagement"),
	QLatin1String("/datamanagement"),
	QLatin1String("org.kde.nepomuk.DataManagement"),
	QLatin1String("setProperty") );
	QString app = KGlobal::mainComponent().componentName();
	QVariantList arguments;
	QVariantList varList;
	- foreach( const Nepomuk::Variant var, value.toVariantList() )
	- varList << var.variant();
	+ foreach( const Nepomuk::Variant var, value.toVariantList() ) {
	+ // make sure resource values are in the store
	+ if( var.simpleType() == qMetaTypeId<Resource>() ) {
	+ var.toResource().m_data->store();
	+ varList << var.toUrl();
	+ }
	+ else {
	+ varList << var.variant();
	+ }
	+ }

	arguments << DBus::convertUriList(QList<QUrl>() << m_uri) << DBus::convertUri(uri)
	<< QVariant(DBus::normalizeVariantList(varList)) << app;
	msg.setArguments( arguments );

	QDBusMessage reply = bus.call( msg );
	if( reply.type() == QDBusMessage::ErrorMessage ) {
	//TODO: Set the error somehow
	kWarning() << reply.errorMessage();
	return;
	}

	// update the cache for now
	if( value.isValid() )
	m_cache[uri] = value;
	else
	m_cache.remove(uri);

	// update the kickofflists
	updateKickOffLists( uri, value );
	}
	}


	void Nepomuk::ResourceData::removeProperty( const QUrl& uri )
	{
	Q_ASSERT( uri.isValid() );
	if( !m_uri.isEmpty() ) {
	QMutexLocker lock(&m_modificationMutex);

	QDBusConnection bus = QDBusConnection::sessionBus();
	QDBusMessage msg = QDBusMessage::createMethodCall( QLatin1String("org.kde.nepomuk.DataManagement"),
	QLatin1String("/datamanagement"),
	QLatin1String("org.kde.nepomuk.DataManagement"),
	QLatin1String("removeProperties") );
	QString app = KGlobal::mainComponent().componentName();
	QVariantList arguments;
	arguments << DBus::convertUri(m_uri) << DBus::convertUri(uri) << app;
	msg.setArguments( arguments );

	QDBusMessage reply = bus.call( msg );
	if( reply.type() == QDBusMessage::ErrorMessage ) {
	//TODO: Set the error somehow
	kWarning() << reply.errorMessage();
	return;
	}

	// Update the cache
	m_cache.remove( uri );

	// update the kickofflists
	updateKickOffLists( uri, Variant() );
	}
	}


	void Nepomuk::ResourceData::remove( bool recursive )
	{
	Q_UNUSED(recursive)
	QMutexLocker lock(&m_modificationMutex);

	if( !m_uri.isEmpty() ) {
	QDBusConnection bus = QDBusConnection::sessionBus();
	QDBusMessage msg = QDBusMessage::createMethodCall( QLatin1String("org.kde.nepomuk.DataManagement"),
	QLatin1String("/datamanagement"),
	QLatin1String("org.kde.nepomuk.DataManagement"),
	QLatin1String("removeResources") );
	QString app = KGlobal::mainComponent().componentName();
	QVariantList arguments;
	// TODO: Set the flag over here
	arguments << DBus::convertUri(m_uri) << 0 << app;
	msg.setArguments( arguments );

	QDBusMessage reply = bus.call( msg );
	if( reply.type() == QDBusMessage::ErrorMessage ) {
	//TODO: Set the error somehow
	kWarning() << reply.errorMessage();
	return;
	}
	}

	resetAll();
	}


	bool Nepomuk::ResourceData::exists()
	{
	if( m_uri.isValid() ) {
	const QString query = QString::fromLatin1("ask { %1 ?p ?o . }")
	.arg( Soprano::Node::resourceToN3(m_uri) );
	return MAINMODEL->executeQuery( query, Soprano::Query::QueryLanguageSparql ).boolValue();
	}
	else {
	return false;
	}
	}


	bool Nepomuk::ResourceData::isValid() const
	{
	return( !m_mainType.isEmpty() && ( !m_uri.isEmpty() \|\| !m_kickoffUris.isEmpty() ) );
	}


	Nepomuk::ResourceData* Nepomuk::ResourceData::determineUri()
	{
	// We have the following possible situations:
	// 1. m_uri is already valid
	// -> simple, nothing to do
	//
	// 2. m_uri is not valid
	// -> we need to determine the URI
	//
	// 2.1. m_kickoffUri is valid
	// 2.1.1. it is a file URL
	// 2.1.1.1. it is nie:url for r
	// -> use r as m_uri
	// 2.1.1.2. it points to a file on a removable device for which we have a filex:/ URL
	// -> use the r in r nie:url filex:/...
	// 2.1.1.3. it is a file which is not an object in some nie:url relation
	// -> create new random m_uri and use kickoffUriOrId() as m_nieUrl
	// 2.1.2. it is a resource URI
	// -> use it as m_uri
	//
	// 2.2. m_kickOffUri is not valid
	// 2.2.1. m_kickOffUri is a nao:identifier for r
	// -> use r as m_uri
	//

	if( m_uri.isEmpty() ) {
	Soprano::Model* model = MAINMODEL;

	if( !m_kickoffUris.isEmpty() ) {
	KUrl kickOffUri = *m_kickoffUris.begin();
	if( kickOffUri.scheme().isEmpty() ) {
	//
	// Not valid. Checking for nao:identifier
	//
	QString query = QString::fromLatin1("select distinct ?r where { ?r %1 %2. } LIMIT 1")
	.arg( Soprano::Node::resourceToN3(Soprano::Vocabulary::NAO::identifier()) )
	.arg( Soprano::Node::literalToN3( kickOffUri.url() ) );

	Soprano::QueryResultIterator it = model->executeQuery( query, Soprano::Query::QueryLanguageSparql );
	if( it.next() ) {
	m_uri = it["r"].uri();
	it.close();
	}
	}
	else {
	//
	// In one query determine if the URI is already used as resource URI or as
	// nie:url
	//
	QString query = QString::fromLatin1("select distinct ?r ?o where { "
	"{ ?r %1 %2 . FILTER(?r!=%2) . } "
	"UNION "
	"{ %2 ?p ?o . } "
	"} LIMIT 1")
	.arg( Soprano::Node::resourceToN3( Nepomuk::Vocabulary::NIE::url() ) )
	.arg( Soprano::Node::resourceToN3( kickOffUri ) );
	Soprano::QueryResultIterator it = model->executeQuery( query, Soprano::Query::QueryLanguageSparql );
	if( it.next() ) {
	QUrl uri = it["r"].uri();
	if( uri.isEmpty() ) {
	m_uri = kickOffUri;
	}
	else {
	m_uri = uri;
	m_nieUrl = kickOffUri;
	}
	it.close();
	}
	else if( kickOffUri.scheme() == QLatin1String("nepomuk") ) {
	// for nepomuk URIs we simply use the kickoff URI as resource URI
	m_uri = kickOffUri;
	}
	else {
	// for everything else we use m_kickoffUri as nie:url with a new random m_uri
	m_nieUrl = kickOffUri;
	}
	}
	}
	}

	//
	// Move us to the final data hash now that the URI is known
	//
	if( !m_uri.isEmpty() ) {
	//vHanda: Is there some way to avoid this hash lookup every time?
	// It sure would speed things up.
	ResourceDataHash::iterator it = m_rm->m_initializedData.find(m_uri);
	if( it == m_rm->m_initializedData.end() ) {
	m_rm->m_initializedData.insert( m_uri, this );
	}
	else {
	return it.value();
	}
	}

	return this;
	}


	void Nepomuk::ResourceData::invalidateCache()
	{
	m_cacheDirty = true;
	}


	Nepomuk::Thing Nepomuk::ResourceData::pimoThing()
	{
	load();
	if( !m_pimoThing ) {
	//
	// We only create a new thing if we are a nie:InformationElement.
	// All other resources will simply be converted into a pimo:Thing
	//
	// Files, however, are a special case in every aspect. this includes pimo things.
	// Files are their own grounding occurrence. This makes a lot of things
	// much simpler.
	//
	if( hasType( Vocabulary::PIMO::Thing() ) \|\|
	isFile() \|\|
	!hasType( Vocabulary::NIE::InformationElement() ) ) {
	m_pimoThing = new Thing(this);
	}
	else {
	m_pimoThing = new Thing();
	}
	m_pimoThing->m_data->m_groundingOccurence = this;
	}
	return *m_pimoThing;
	}


	bool Nepomuk::ResourceData::operator==( const ResourceData& other ) const
	{
	if( this == &other )
	return true;

	return( m_uri == other.m_uri &&
	m_mainType == other.m_mainType &&
	m_kickoffUris == other.m_kickoffUris );
	}


	QDebug Nepomuk::ResourceData::operator<<( QDebug dbg ) const
	{
	KUrl::List list = m_kickoffUris.toList();
	dbg << QString::fromLatin1("[kickoffuri: %1; uri: %2; type: %3; ref: %4]")
	.arg( list.toStringList().join(QLatin1String(",")),
	m_uri.url(),
	m_mainType.toString() )
	.arg( m_ref );

	return dbg;
	}


	QDebug operator<<( QDebug dbg, const Nepomuk::ResourceData& data )
	{
	return data.operator<<( dbg );
	}


	void Nepomuk::ResourceData::updateKickOffLists(const QUrl& prop, const Nepomuk::Variant& v)
	{
	KUrl oldUrl;
	KUrl newUrl;
	if( prop == Nepomuk::Vocabulary::NIE::url() ) {
	oldUrl = m_nieUrl;
	newUrl = v.toUrl();
	m_nieUrl = newUrl;
	}
	else if( prop == Soprano::Vocabulary::NAO::identifier() ) {
	Q_FOREACH( const KUrl& url, m_kickoffUris ) {
	if( url.scheme().isEmpty() ) {
	oldUrl = url;
	break;
	}
	}
	newUrl = KUrl( v.toString() );
	}
	else {
	return;
	}

	if( oldUrl != newUrl ) {
	QMutexLocker rmlock(&m_rm->mutex);

	m_kickoffUris.remove( oldUrl );
	m_rm->m_uriKickoffData.remove( oldUrl );

	if( !newUrl.isEmpty() ) {
	m_kickoffUris.insert( newUrl );
	m_rm->m_uriKickoffData.insert( newUrl, this );
	}
	}
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