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
* @return the user property definition handle, or <code>null</code> if
	 *         the no property exists with the given name or it is not a
	 *         user-defined property.
	 */
	public UserPropertyDefnHandle getUserPropertyDefnHandle( String propName )
	{
		DesignElement element = getElement( );
		ElementPropertyDefn propDefn = element.getPropertyDefn( propName );
		if ( propDefn == null )
			return null;
		if ( propDefn.isUserProperty( ) )
		{
			return new UserPropertyDefnHandle( this,
					(UserPropertyDefn) propDefn );
		}
		return null;
	}
	/**
	 * Returns a list of user properties defined in this element and somewhere
	 * up the inheritance chain. Each object in the list is instance of
	 * <code>UserPropertyDefn</code>.
	 * 
	 * @return The list of user property definitions
	 */
	public List getUserProperties( )
	{
		return getElement( ).getUserProperties( );
	}
	/**
	 * Returns a handle for a top-level property for use in preparing the