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
return false;
			}
		}
		return true;
	}
	/**
	 * Value will be returned as string only if all values of this property are
	 * equal within the collection of elements.
	 * 
	 * @return The 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#getStringValue()
	 */
	public String getStringValue( )
	{
		if ( !shareSameValue( ) )
			return null;
		
		
		List elements = handle.getElements( );
		return ( (DesignElementHandle) elements.get( 0 ) )
				.getStringProperty( propDefn.getName( ) );
	}
	/**
	 * Value will be returned as string only if all values of this property are
	 * equal within the collection of elements and one of them has a local
	 * value.
	 * 
	 * @return The value as string if all the element values for the property