private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.speech.v2.DeleteRecognizerRequest,
            com.google.cloud.speech.v2.DeleteRecognizerRequest.Builder,
            com.google.cloud.speech.v2.DeleteRecognizerRequestOrBuilder>
        getDeleteRecognizerRequestFieldBuilder() {
      if (deleteRecognizerRequestBuilder_ == null) {
        if (!(requestCase_ == 11)) {
          request_ = com.google.cloud.speech.v2.DeleteRecognizerRequest.getDefaultInstance();
        }
        deleteRecognizerRequestBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.speech.v2.DeleteRecognizerRequest,
                com.google.cloud.speech.v2.DeleteRecognizerRequest.Builder,
                com.google.cloud.speech.v2.DeleteRecognizerRequestOrBuilder>(
                (com.google.cloud.speech.v2.DeleteRecognizerRequest) request_,
                getParentForChildren(),
                isClean());
        request_ = null;
      }
      requestCase_ = 11;
      onChanged();
      return deleteRecognizerRequestBuilder_;
    }
<pre>
The DeleteRecognizerRequest that spawned the Operation.
</pre>

<code>.google.cloud.speech.v2.DeleteRecognizerRequest delete_recognizer_request = 11;</code>
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/OperationMetadata.java