call method

  1. @override
Object? call(
  1. Interpreter interpreter,
  2. List<Object?> arguments,
  3. Map<Symbol, Object?> namedArguments
)
override

Implementation

@override
Object? call(Interpreter interpreter, List<Object?> arguments,
    Map<Symbol, Object?> namedArguments) {
  var preferredSize = namedArguments[const Symbol('preferredSize')];
  if (preferredSize == null) {
    throw "preferredSize required in PreferredSizeWidget";
  }
  var child = namedArguments[const Symbol('child')];
  if (child == null) {
    throw "child required in PreferredSizeWidget";
  }
  return PreferredSize(
      child: child as Widget, preferredSize: preferredSize as Size);
}