the gtk.cell_area.CellAreaContext used to hold sizes for area.
the gtk.widget.Widget that area is rendering on
the whole allocated area for area in widget for this row
the x position
the y position
where to store the inner allocated area of the returned cell renderer
the gtk.cell_renderer.CellRenderer at x and y.
Gets the gtk.cell_renderer.CellRenderer at x and y coordinates inside area and optionally returns the full cell allocation for it inside cell_area.