whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>({
  1. TResult? success(
    1. PrepareDetailedResponseSuccessCompat value
    )?,
  2. TResult? error(
    1. PrepareResponseError value
    )?,
})

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( PrepareDetailedResponseSuccessCompat value)?  success,TResult? Function( PrepareResponseError value)?  error,}) {final _that = this;
switch (_that) {
case PrepareDetailedResponseCompat_Success() when success != null:
return success(_that.value);case PrepareDetailedResponseCompat_Error() when error != null:
return error(_that.value);case _:
  return null;

}
}