.getPropertyHandle( SimpleDataSet.CACHED_METADATA_PROP );
.getPropertyHandle( IDataSetModel.CACHED_METADATA_PROP );
	public CachedMetaDataHandle getCachedMetaDataHandle( )	{		PropertyHandle propHandle = this				.getPropertyHandle( SimpleDataSet.CACHED_METADATA_PROP );		assert propHandle != null;		CachedMetaData value = (CachedMetaData) propHandle.getValue( );		if ( value == null )			return null;		return (CachedMetaDataHandle) value.getHandle( propHandle );	}