public Builder addAllNestedType(
          java.lang.Iterable<? extends com.google.protobuf.DescriptorProtos.DescriptorProto> values) {
        if (nestedTypeBuilder_ == null) {
          ensureNestedTypeIsMutable();
          super.addAll(values, nestedType_);
          onChanged();
        } else {
          nestedTypeBuilder_.addAllMessages(values);
        }
        return this;
      }