whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. bool autoShow,
    2. RefreshController<T>? controller,
    3. SearchSupportCoreUiBuild childBuilder,
    4. SearchSupportActionListening? listening,
    )?
)

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( bool autoShow,  RefreshController<T>? controller,  SearchSupportCoreUiBuild childBuilder,  SearchSupportActionListening? listening)?  $default,) {final _that = this;
switch (_that) {
case _SearchSupportParams() when $default != null:
return $default(_that.autoShow,_that.controller,_that.childBuilder,_that.listening);case _:
  return null;

}
}