public VoiceSettings withEngine(String engine) {
        setEngine(engine);
        return this;
    }
<p>
Indicates the type of Amazon Polly voice that Amazon Lex should use for voice interaction with the user. For more
information, see the <a href=
"https://docs.aws.amazon.com/polly/latest/dg/API_SynthesizeSpeech.html#polly-SynthesizeSpeech-request-Engine">
<code>engine</code> parameter of the <code>SynthesizeSpeech</code> operation</a> in the <i>Amazon Polly developer
guide</i>.
</p>
<p>
If you do not specify a value, the default is <code>standard</code>.
</p>

@param engine
       Indicates the type of Amazon Polly voice that Amazon Lex should use for voice interaction with the user.
       For more information, see the <a href=
       "https://docs.aws.amazon.com/polly/latest/dg/API_SynthesizeSpeech.html#polly-SynthesizeSpeech-request-Engine"
       > <code>engine</code> parameter of the <code>SynthesizeSpeech</code> operation</a> in the <i>Amazon Polly
       developer guide</i>.</p>
       <p>
       If you do not specify a value, the default is <code>standard</code>.
@return Returns a reference to this object so that method calls can be chained together.
@see VoiceEngine
aws-java-sdk-lexmodelsv2/src/main/java/com/amazonaws/services/lexmodelsv2/model/VoiceSettings.java