whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String? host,
    2. String? path,
    3. Map<String, String>? headers,
    4. bool? acceptProxyProtocol,
    )?
)

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? host,  String? path,  Map<String, String>? headers,  bool? acceptProxyProtocol)?  $default,) {final _that = this;
switch (_that) {
case _HttpUpgradeConfig() when $default != null:
return $default(_that.host,_that.path,_that.headers,_that.acceptProxyProtocol);case _:
  return null;

}
}