public com.google.protobuf.FieldMaskOrBuilder getConfigMaskOrBuilder() {
      if (configMaskBuilder_ != null) {
        return configMaskBuilder_.getMessageOrBuilder();
      } else {
        return configMask_ == null
            ? com.google.protobuf.FieldMask.getDefaultInstance()
            : configMask_;
      }
    }
<pre>
The list of fields in
[config][google.cloud.speech.v2.BatchRecognizeFileMetadata.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.BatchRecognizeFileMetadata.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.BatchRecognizeFileMetadata.config]
completely overrides and replaces the config in the recognizer for this
recognition request.
</pre>

<code>.google.protobuf.FieldMask config_mask = 5;</code>
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/BatchRecognizeFileMetadata.java