Bug 176436 Charts Imported from Libraries do not update when libraries change
During a live presentation of BIRT at EclipseCon, we came across a rather embarassing issue. When charts are included in a library, and imported into a report design from a library, any changes to the library instance of the chart do not reflect in the report itself.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/elements/ExtendedItem.java
* Returns the extensibility provider which provides the functionality of
	 * this extendable element.
	 * 
	 * @return the extensibility provider which provides the functionality of
	 *         this extendable element.
	 */
	public PeerExtensibilityProvider getExtensibilityProvider( )
	{
		return this.provider;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.core.DesignElement#getIntrinsicProperty(java.lang.String)
	 */
	protected Object getIntrinsicProperty( String propName )
	{
		if ( EXTENSION_NAME_PROP.equals( propName ) )
			return extensionName;
		return super.getIntrinsicProperty( propName );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.core.DesignElement#setIntrinsicProperty(java.lang.String,
	 *      java.lang.Object)
	 */
	protected void setIntrinsicProperty( String propName, Object value )
	{
		if ( EXTENSION_NAME_PROP.equals( propName ) )