Method try_ref

crates/vm/src/stdlib/marshal.rs:136–146

(&mut self, buf: &mut Vec<u8>, obj: &PyObjectRef)

            }
        }
        fn try_ref(&mut self, buf: &mut Vec<u8>, obj: &PyObjectRef) -> bool {
            use marshal::Write;
            let id = obj.get_id();
            if let Some(&idx) = self.map.get(&id) {
                buf.write_u8(b'r');
                buf.write_u32(idx);
                true
            } else {
                false
            }
        }
        fn reserve(&mut self, obj: &PyObjectRef) -> u32 {
            let idx = self.next_idx;
            self.map.insert(obj.get_id(), idx);