textWidthBasis property
Defines how to measure the width of the rendered text.
Implementation
TextWidthBasis get textWidthBasis => _textPainter.textWidthBasis;Implementation
set textWidthBasis(TextWidthBasis value) {
  if (_textPainter.textWidthBasis == value) {
    return;
  }
  _textPainter.textWidthBasis = value;
  markNeedsLayout();
}