@java.lang.Override
  public com.google.cloud.translate.v3beta1.DocumentInputConfigOrBuilder
      getDocumentInputConfigOrBuilder() {
    return documentInputConfig_ == null
        ? com.google.cloud.translate.v3beta1.DocumentInputConfig.getDefaultInstance()
        : documentInputConfig_;
  }
<pre>
Required. Input configurations.
</pre>

<code>
.google.cloud.translation.v3beta1.DocumentInputConfig document_input_config = 4 [(.google.api.field_behavior) = REQUIRED];
</code>
java-translate/proto-google-cloud-translate-v3beta1/src/main/java/com/google/cloud/translate/v3beta1/TranslateDocumentRequest.java