Method MutableInputChannel

src/babylon/anyflow/dependency.h:288–288

GraphDependency的轻量级包装，可以默认构造和拷贝移动

 public:
  // GraphDependency的轻量级包装，可以默认构造和拷贝移动
  inline MutableInputChannel() noexcept = default;
  inline MutableInputChannel(const MutableInputChannel&) noexcept = default;
  inline MutableInputChannel& operator=(const MutableInputChannel&) noexcept =
      default;