Semantics.fromProperties constructor Null safety
Creates a semantic annotation using SemanticsProperties.
The container and properties arguments must not be null.
Implementation
const Semantics.fromProperties({
  super.key,
  super.child,
  this.container = false,
  this.explicitChildNodes = false,
  this.excludeSemantics = false,
  required this.properties,
}) : assert(container != null),
     assert(properties != null);