public Builder mergeHttpBody(com.google.api.HttpBody value) {
      if (httpBodyBuilder_ == null) {
        if (((bitField0_ & 0x00000002) != 0)
            && httpBody_ != null
            && httpBody_ != com.google.api.HttpBody.getDefaultInstance()) {
          getHttpBodyBuilder().mergeFrom(value);
        } else {
          httpBody_ = value;
        }
      } else {
        httpBodyBuilder_.mergeFrom(value);
      }
      if (httpBody_ != null) {
        bitField0_ |= 0x00000002;
        onChanged();
      }
      return this;
    }
<pre>
The http body contains the queue.yaml file which used to update queue lists
</pre>

<code>optional .google.api.HttpBody http_body = 2;</code>
java-tasks/proto-google-cloud-tasks-v2beta2/src/main/java/com/google/cloud/tasks/v2beta2/UploadQueueYamlRequest.java