Method is_pinned

be/src/runtime/buffered-tuple-stream.h:413–413

  bool is_closed() const { return closed_; }
  bool is_pinned() const { return pinned_; }
  // Returns true if there is an active embedded read iterator.
  bool has_read_iterator() const { return read_it_.is_valid(); }
  bool has_write_iterator() const { return has_write_iterator_; }