Bug 123406 Add geLocaltStringProperty in GroupElementHandle and GroupPropertyHandle
Please refer to 123405. GUI need a way to get the local setting of given property because current getStringPropery method will return inherited value if there are no local value.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/GroupPropertyHandle.java
}
			else
			{
				if ( !baseValue.equals( value ) )
					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