private void buildPartialOneofs(com.google.cloud.translate.v3.DocumentInputConfig result) {
      result.sourceCase_ = sourceCase_;
      result.source_ = this.source_;
      if (sourceCase_ == 2 && gcsSourceBuilder_ != null) {
        result.source_ = gcsSourceBuilder_.build();
      }
    }
<pre>
A document translation request input config.
</pre>

Protobuf type {@code google.cloud.translation.v3.DocumentInputConfig}
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/DocumentInputConfig.java