public java.lang.String getSsml() {
    java.lang.Object ref = "";
    if (inputSourceCase_ == 2) {
      ref = inputSource_;
    }
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      if (inputSourceCase_ == 2) {
        inputSource_ = s;
      }
      return s;
    }
  }
<pre>
The SSML document to be synthesized. The SSML document must be valid
and well-formed. Otherwise the RPC will fail and return
[google.rpc.Code.INVALID_ARGUMENT][google.rpc.Code.INVALID_ARGUMENT]. For
more information, see
[SSML](https://cloud.google.com/text-to-speech/docs/ssml).
</pre>

<code>string ssml = 2;</code>

@return The ssml.
java-texttospeech/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesisInput.java