maybeWhen<TResult extends Object?> method

  1. @optionalTypeArgs
TResult maybeWhen<TResult extends Object?>(
  1. TResult $default(
    1. ElementTheme theme,
    2. Map<String, String>? variables,
    3. Map<String, Map<String, String>>? rules,
    4. ElementAppearanceLabels labels,
    )?, {
  2. required TResult orElse(),
})

A variant of when that fallback to an orElse callback.

It is equivalent to doing:

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

Implementation

@optionalTypeArgs TResult maybeWhen<TResult extends Object?>(TResult Function( ElementTheme theme,  Map<String, String>? variables,  Map<String, Map<String, String>>? rules,  ElementAppearanceLabels labels)?  $default,{required TResult orElse(),}) {final _that = this;
switch (_that) {
case _ElementAppearance() when $default != null:
return $default(_that.theme,_that.variables,_that.rules,_that.labels);case _:
  return orElse();

}
}