whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>({
  1. TResult? success(
    1. T response
    )?,
  2. TResult? failure(
    1. NetworkExceptions error
    )?,
})

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( T response)?  success,TResult? Function( NetworkExceptions error)?  failure,}) {final _that = this;
switch (_that) {
case Success() when success != null:
return success(_that.response);case Failure() when failure != null:
return failure(_that.error);case _:
  return null;

}
}