bottomLeftCorner property
Optional widget that will be laid out in the bottom left corner (below the row header and to the left of the horizontal scroll bar).
If rowHeader is not specified or the horizontal scroll bar is not shown, then there is no bottom left corner, and this widget will not be rendered.
If this widget is not specified, and a bottom left corner exists, then a default "empty" corner will be automatically created and laid out in this spot.
Implementation
final Widget bottomLeftCorner;