code: public com.google.protobuf.ByteString
        getMaybeTypeNameBytes() {
      java.lang.Object ref = maybeTypeName_;
      if (ref instanceof java.lang.String) {
        com.google.protobuf.ByteString b = 
            com.google.protobuf.ByteString.copyFromUtf8(
                (java.lang.String) ref);
        maybeTypeName_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
docs: <pre>
  For debug-only, the name of the type pointed to by this handle, if
  available.
  </pre>
  
  <code>optional string maybe_type_name = 5;</code>