whenOrNull<TResult extends Object?> method

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? $default(String tag, @JsonKey.new(name: 'selector') XrayStringList selectors, StrategyConfig? strategy, String? fallbackTag,)?)

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 tag, @JsonKey(name: 'selector')  XrayStringList selectors,  StrategyConfig? strategy,  String? fallbackTag)?  $default,) {final _that = this;
switch (_that) {
case _BalancingRule() when $default != null:
return $default(_that.tag,_that.selectors,_that.strategy,_that.fallbackTag);case _:
  return null;

}
}