if( null == parent ) { throw new IllegalArgumentException( "The parent can't be null!" ); } if( null == queryName ) { throw new IllegalArgumentException( "The queryName can't be null!" ); }
	public DataSetID( DataSetID parent, long rowId, String queryName )	{		this.parent = parent;		this.rowId = rowId;		this.queryName = queryName;	}