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/extension/PeerExtensibilityProvider.java
}
		
		Object value = extensionPropValues.get( propName );
		if ( value == null )
			return null;
		ElementPropertyDefn defn = (ElementPropertyDefn) getPropertyDefn( propName );
		if ( defn.getTypeCode( ) == IPropertyType.ELEMENT_REF_TYPE )
		{
			Module root = element.getRoot( );
			if ( root != null )
				return ReferenceValueUtil.resolveElementReference( root,
						element,
						defn,
						(ElementRefValue) value );
		}
		return extensionPropValues.get( propName );
	}
	/**
	 * Sets the value for extension property or extension model property.
	 * 
	 * @param prop
	 *            the definition of the property
	 * @param value
	 *            the value to set
	 */
	public void setExtensionProperty( ElementPropertyDefn prop, Object value )
	{
		if ( isExtensionXMLProperty( prop.getName( ) )
				&& hasOwnModel( prop.getName( ) ) )
		{