Dialogflow/src/V2/OutputAudioConfig.php
public function setSynthesizeSpeechConfig($var)
    {
        GPBUtil::checkMessage($var, \Google\Cloud\Dialogflow\V2\SynthesizeSpeechConfig::class);
        $this->synthesize_speech_config = $var;

        return $this;
    }
public function setSynthesizeSpeechConfig($var)
    {
        GPBUtil::checkMessage($var, \Google\Cloud\Dialogflow\V2\SynthesizeSpeechConfig::class);
        $this->synthesize_speech_config = $var;

        return $this;
    }
public function setSynthesizeSpeechConfig ( $ var ) { GPBUtil :: checkMessage ( $ var , \ Google \ Cloud \ Dialogflow \ V2 \ SynthesizeSpeechConfig :: class ) ; $ this -> synthesize_speech_config = $ var ; return $ this ; }
Optional. Configuration of how speech should be synthesized.

Generated from protobuf field <code>.google.cloud.dialogflow.v2.SynthesizeSpeechConfig synthesize_speech_config = 3;</code>
@param \Google\Cloud\Dialogflow\V2\SynthesizeSpeechConfig $var
@return $this
Optional . Configuration of how speech should be synthesized .