mapOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? mapOrNull<TResult extends Object?>({
  1. TResult? static(
    1. InputProfilePhotoStatic value
    )?,
  2. TResult? animated(
    1. InputProfilePhotoAnimated value
    )?,
})

A variant of map that fallback to returning null.

It is equivalent to doing:

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

Implementation

@optionalTypeArgs
TResult? mapOrNull<TResult extends Object?>({
  TResult? Function(InputProfilePhotoStatic value)? static,
  TResult? Function(InputProfilePhotoAnimated value)? animated,
}) {
  final _that = this;
  switch (_that) {
    case InputProfilePhotoStatic() when static != null:
      return static(_that);
    case InputProfilePhotoAnimated() when animated != null:
      return animated(_that);
    case _:
      return null;
  }
}