pub fn set_call_responses<F>(&mut self, responses: F)
    where
        F: Fn(&Transaction, &OneshotEnv) -> ExecutionResult + 'static + Send + Sync,
    {
        self.call_responses = self.wrap_responses(responses);
    }
Sets call response closure used by this executor.
core/lib/vm_executor/src/oneshot/mock.rs