@java.lang.Override
    public final boolean isInitialized() {
      return true;
    }
<pre>
Input to be synthesized.
</pre>

Protobuf type {@code google.cloud.texttospeech.v1beta1.StreamingSynthesisInput}
java-texttospeech/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/StreamingSynthesisInput.java