whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. int id,
    2. bool success,
    3. String message,
    4. List<String> errors,
    )?
)

A variant of when that fallback to returning null

It is equivalent to doing:

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

Implementation

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? Function( int id,  bool success,  String message,  List<String> errors)?  $default,) {final _that = this;
switch (_that) {
case _BaseCommandResponse() when $default != null:
return $default(_that.id,_that.success,_that.message,_that.errors);case _:
  return null;

}
}