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/api/DesignElementHandle.java
*            the name of the property to get. Can be a system-defined or
	 *            user-defined property name.
	 * 
	 * @return the property binding, or null if the overridden value is not set
	 */
	public String getPropertyBinding( String propName )
	{
		if ( propName == null )
			return null;
		DesignElement element = getElement( );
		while ( element != null && element.getRoot( ) != null )
		{
			PropertyBinding propBinding = element.getRoot( )
					.findPropertyBinding( element, propName );
			if ( propBinding != null )
				return propBinding.getValue( );
			if ( element.isVirtualElement( ) )
			{
				element = element.getVirtualParent( );
			}
			else
			{
				element = element.getExtendsElement( );
			}
		}
		return null;
	}
	/**
	 * Gets all the defined property bindings for the given element. Each one in
	 * the list is instance of <code>PropertyBinding</code>.