Method from_weak

src/config/volume.rs:37–47

(weak: Weak<MainWindow>)

    }

    pub(crate) fn from_weak(weak: Weak<MainWindow>) -> Self {
        if let Some(window) = weak.upgrade() {
            VolumeConfig {
                main: window.get_main_volume(),
                bgm: window.get_bgm_volume(),
                voice: window.get_voice_volume(),
            }
        } else {
            unreachable!()
        }
    }
}

impl Executor {