whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String? type,
    2. Object? bytes,
    3. int? u64,
    4. String? reuse,
    5. String? metadata,
    6. CustomTransform? transform,
    )?
)

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( String? type,  Object? bytes,  int? u64,  String? reuse,  String? metadata,  CustomTransform? transform)?  $default,) {final _that = this;
switch (_that) {
case _CustomTransformArg() when $default != null:
return $default(_that.type,_that.bytes,_that.u64,_that.reuse,_that.metadata,_that.transform);case _:
  return null;

}
}