public CellInstance( CellContent cell, IRowData data, ExecutionContext context, boolean fromGrid )
public CellInstance( CellContent cell, ExecutionContext context, boolean fromGrid )
	public CellInstance( CellContent cell, IRowData data,			ExecutionContext context, boolean fromGrid )	{		super( cell, context );		this.data = data;		this.cell = ( CellContent ) content;		this.fromGrid = fromGrid;	}