map<TResult extends Object?> method

@optionalTypeArgs TResult map<TResult extends Object?>(TResult $default(_ImageParams 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?>(
  TResult Function(_ImageParams value) $default,
) {
  final _that = this;
  switch (_that) {
    case _ImageParams():
      return $default(_that);
  }
}