851                 let Some(callback) = store  in handle_guest_call()
854                     .callback  in handle_guest_call()
860                 let code = callback(store, event, handle)?;  in handle_guest_call()
865                     .callback = Some(callback);  in handle_guest_call()
1983                     task.callback = None;  in handle_callback_code()
2124         callback: Option<SendSyncPtr<VMFuncRef>>,  in queue_call()
2207         let fun = if callback.is_some() {  in queue_call()
2630         callback: *mut VMFuncRef,  in start_call()
2650         if let Some(callback) = NonNull::new(callback) {  in start_call()
2654             let callback = SendSyncPtr::new(callback);  in start_call()  localVariable
2655             task.callback = Some(Box::new(move |store, event, handle| {  in start_call()
2657                 unsafe { self.call_callback::<T>(store, callback, event, handle) }  in start_call()
2678                 NonNull::new(callback).map(SendSyncPtr::new),  in start_call()
3789         callback: *mut VMFuncRef,  in sync_start()
3801         callback: *mut VMFuncRef,  in async_start()
3977         callback: *mut VMFuncRef,  in sync_start()
3987                     callback,  in sync_start()
4005         callback: *mut VMFuncRef,  in async_start()
4015                 callback,  in async_start()
4471     callback: Option<CallbackFn>,  field
4548         callback: Option<CallbackFn>,  in new()
4570             callback,  in new()
5359     let callback = options.callback.map(|i| instance.runtime_callback(i));  in prepare_call()  localVariable
5392         callback.map(|callback| {  in prepare_call()
5393             let callback = SendSyncPtr::new(callback);  in prepare_call()  localVariable
5399                 unsafe { instance.call_callback(store, callback, event, handle) }  in prepare_call()
5466     let callback = raw_options.callback;  in queue_call0()  localVariable
5470     let callback = callback.map(|i| {  in queue_call0()  localVariable
5488             callback,  in queue_call0()