public Builder setExtensionRange(
          int index, com.google.protobuf.DescriptorProtos.DescriptorProto.ExtensionRange.Builder builderForValue) {
        if (extensionRangeBuilder_ == null) {
          ensureExtensionRangeIsMutable();
          extensionRange_.set(index, builderForValue.build());
          onChanged();
        } else {
          extensionRangeBuilder_.setMessage(index, builderForValue.build());
        }
        return this;
      }