public Builder setConfigMask(com.google.protobuf.FieldMask value) {
      if (configMaskBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        configMask_ = value;
      } else {
        configMaskBuilder_.setMessage(value);
      }
      bitField0_ |= 0x00000004;
      onChanged();
      return this;
    }
<pre>
The list of fields in
[config][google.cloud.speech.v2.RecognizeRequest.config] that override the
values in the
[default_recognition_config][google.cloud.speech.v2.Recognizer.default_recognition_config]
of the recognizer during this recognition request. If no mask is provided,
all non-default valued fields in
[config][google.cloud.speech.v2.RecognizeRequest.config] override the
values in the recognizer for this recognition request. If a mask is
provided, only the fields listed in the mask override the config in the
recognizer for this recognition request. If a wildcard (`*`) is provided,
[config][google.cloud.speech.v2.RecognizeRequest.config] completely
overrides and replaces the config in the recognizer for this recognition
request.
</pre>

<code>.google.protobuf.FieldMask config_mask = 8;</code>
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/RecognizeRequest.java