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/GroupPropertyHandle.java
{
			DesignElementHandle element = (DesignElementHandle) elements
					.get( i );
			Object value = element.getElement( ).getLocalProperty(
					element.getModule( ), propDefn );
			if ( value != null )
				return value;
		}
		return null;
	}
	/**
	 * Value will be returned as string only if all values of this property are
	 * equal within the collection of elements. The value return are localized.
	 * 
	 * @return The localized value as string if all the element values for the
	 *         property are equal. Return null, if elements have different value
	 *         for the property.
	 * @see SimpleValueHandle#getDisplayValue()
	 */
	public String getDisplayValue( )
	{
		if ( !shareSameValue( ) )
			return null;
		
		
		List elements = handle.getElements( );
		return ( (DesignElementHandle) elements.get( 0 ) )
				.getDisplayProperty( propDefn.getName( ) );
	}
	/**