TextWidget<T>  constructor 
- TextBits parent,
 - WidgetPlaceholder<
T> child, - {PlaceholderAlignment alignment: PlaceholderAlignment.baseline,
 - TextBaseline baseline: TextBaseline.alphabetic}
 
Creates an inline widget.
Implementation
TextWidget(
  TextBits parent,
  this.child, {
  this.alignment = PlaceholderAlignment.baseline,
  this.baseline = TextBaseline.alphabetic,
})  : assert(parent != null),
      assert(child != null),
      assert(alignment != null),
      assert(baseline != null),
      super(parent);