paint method
Paints this render object into the given context at offset.
Implementation
@override
void paint(PaintingContext context, Offset offset) {
_ensureStylesCached();
_paintBackground(context, offset);
_paintBorder(context, offset);
final String checkChar = _getCheckChar();
if (checkChar.isNotEmpty) {
_paintIndicator(context, offset, checkChar);
}
}