map<TResult extends Object?> method

  1. @optionalTypeArgs
TResult map<TResult extends Object?>({
  1. required TResult solid(
    1. BackgroundFillSolid value
    ),
  2. required TResult gradient(
    1. BackgroundFillGradient value
    ),
  3. required TResult freeformGradient(
    1. BackgroundFillFreeformGradient value
    ),
})

A switch-like method, using callbacks.

Callbacks receives the raw object, upcasted. It is equivalent to doing:

switch (sealedClass) {
  case final Subclass value:
    return ...;
  case final Subclass2 value:
    return ...;
}

Implementation

@optionalTypeArgs
TResult map<TResult extends Object?>({
  required TResult Function(BackgroundFillSolid value) solid,
  required TResult Function(BackgroundFillGradient value) gradient,
  required TResult Function(BackgroundFillFreeformGradient value)
  freeformGradient,
}) {
  final _that = this;
  switch (_that) {
    case BackgroundFillSolid():
      return solid(_that);
    case BackgroundFillGradient():
      return gradient(_that);
    case BackgroundFillFreeformGradient():
      return freeformGradient(_that);
  }
}