Method contains

packages/engine-shared/src/types/handle.rs:317–319

检查句柄是否有效 Check if handle is valid.

(&self, handle: Handle<M>)

    ///
    /// Check if handle is valid.
    pub fn contains<M>(&self, handle: Handle<M>) -> bool {
        self.get(handle).is_some()
    }

    /// 获取当前资源数量
    ///