6     fn call_once(self, arg: A) -> Self::Output;  in call_once()  method
14     fn call_once(self, arg: A) -> R {  in call_once()  function
84     fn call_once(self, arg: A) -> Self::Output {  in call_once()  method
100     fn call_once(self, arg: A) -> Self::Output {  in call_once()  function
131     fn call_once(self, arg: Result<T, T>) -> Self::Output {  in call_once()  method
149     fn call_once(self, arg: A) -> Self::Output {  in call_once()  function
186     fn call_once(self, arg: Result<T, E>) -> Self::Output {  in call_once()  function
218     fn call_once(self, arg: Result<T, E>) -> Self::Output {  in call_once()  function
250     fn call_once(self, arg: &'a Result<T, E>) -> Self::Output {  in call_once()  function
288     fn call_once(self, arg: &'a Result<T, E>) -> Self::Output {  in call_once()  function
331     fn call_once(self, arg: Result<T, E>) -> Self::Output {  in call_once()  function
367     fn call_once(self, arg: A) -> Self::Output {  in call_once()  function