public Builder clearRecognizer() {
      recognizer_ = getDefaultInstance().getRecognizer();
      bitField0_ = (bitField0_ & ~0x00000001);
      onChanged();
      return this;
    }
<pre>
Required. The name of the Recognizer to use during recognition. The
expected format is
`projects/{project}/locations/{location}/recognizers/{recognizer}`. The
{recognizer} segment may be set to `_` to use an empty implicit Recognizer.
</pre>

<code>
string recognizer = 3 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
</code>

@return This builder for chaining.
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/RecognizeRequest.java