fitGridPaintedTextHeight function
The height of a cell's laid-out text.
Null for a cell outside the viewport, which has not been laid out. Assert on it against fitGridRowHeight to prove a wrapping cell stays inside its row rather than painting over the one below.
Implementation
double? fitGridPaintedTextHeight({
required int row,
required int column,
int index = 0,
}) => fitGridSection(index: index).paintedTextHeight(row, column);