RenderOpacity constructor
Creates a partially transparent render object.
The opacity argument must be between 0.0 and 1.0, inclusive.
Implementation
RenderOpacity({double opacity = 1.0, bool alwaysIncludeSemantics = false, RenderBox? child})
  : assert(opacity >= 0.0 && opacity <= 1.0),
    _opacity = opacity,
    _alwaysIncludeSemantics = alwaysIncludeSemantics,
    _alpha = ui.Color.getAlphaFromOpacity(opacity),
    super(child);