Bug 155943 "Restore Properties" is always enabled for extended chart
Steps to reproduce: 1.New a report, includes a library, extends lib.chart 2.Choose the chart Expected result: "Restore Properties" is disabled untill set/change any local properties for the chart Actual result: "Restore Properties" is always enabled
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/GroupElementHandle.java
name ) ) )
							return true;
						else
							continue;
					}
				}
				if ( elementHandle.getElement( ).getLocalProperty(
						elementHandle.getModule( ), name ) != null )
					return true;
			}
		}
		return false;
	}
	/**
	 * Checks if all elements have extends parents or virtual parents.
	 * 
	 * @return <code>true</code> If all elements have extend parents or
	 *         virtual parents. Otherwise <code>false</code>;
	 */
	protected abstract boolean allExtendedElements( );
	/**
	 * Checks whether a property is read-only in the property sheet. The visible
	 * property is read-only in all <code>elements</code>.
	 * 
	 * @param propName
	 *            the property name
	 * @return <code>true</code> if it is read-only. Otherwise
	 *         <code>false</code>.
	 */
	abstract protected boolean isPropertyReadOnly( String propName );