Method trace_event

crates/vm/src/protocol/callable.rs:200–210

(
        &self,
        event: TraceEvent,
        arg: Option<PyObjectRef>,
    )

    /// - For 'line'/'return' events: the return value can update `f_trace`
    #[inline]
    pub(crate) fn trace_event(
        &self,
        event: TraceEvent,
        arg: Option<PyObjectRef>,
    ) -> PyResult<Option<PyObjectRef>> {
        if self.use_tracing.get() {
            self._trace_event_inner(event, arg)
        } else {
            Ok(None)
        }
    }
    fn _trace_event_inner(
        &self,
        event: TraceEvent,