map<TResult extends Object?>  method 
    Null safety
- {required TResult http(
- NetworkHttpRequest value
 
 - required TResult formSubmit(
- FormSubmitNetworkRequest value
 
 
@optionalTypeArgs, inherited
    Implementation
@optionalTypeArgs
TResult map<TResult extends Object?>({
  required TResult Function(NetworkHttpRequest value) http,
  required TResult Function(FormSubmitNetworkRequest value) formSubmit,
}) =>
    throw _privateConstructorUsedError;