247     call_hook: Option<CallHookInner<T>>,  field
785             call_hook: None,  in try_new()
985     pub fn call_hook(  in call_hook()  method
989         self.inner.call_hook = Some(CallHookInner::Sync(Box::new(hook)));  in call_hook()
1511     pub fn call_hook(&mut self, s: CallHook) -> Result<()> {  in call_hook()  method
1512         if self.inner.pkey.is_none() && self.call_hook.is_none() {  in call_hook()
1532         if let Some(mut call_hook) = self.call_hook.take() {  in call_hook_slow_path()
1533             let result = self.invoke_call_hook(&mut call_hook, s);  in call_hook_slow_path()
1534             self.call_hook = Some(call_hook);  in call_hook_slow_path()
1541     fn invoke_call_hook(&mut self, call_hook: &mut CallHookInner<T>, s: CallHook) -> Result<()> {  in invoke_call_hook()
1542         match call_hook {  in invoke_call_hook()