public Builder addAllExtensionRange(
          java.lang.Iterable<? extends com.google.protobuf.DescriptorProtos.DescriptorProto.ExtensionRange> values) {
        if (extensionRangeBuilder_ == null) {
          ensureExtensionRangeIsMutable();
          super.addAll(values, extensionRange_);
          onChanged();
        } else {
          extensionRangeBuilder_.addAllMessages(values);
        }
        return this;
      }