public Builder mergeFrom(com.google.cloud.texttospeech.v1beta1.StreamingSynthesisInput other) {
      if (other
          == com.google.cloud.texttospeech.v1beta1.StreamingSynthesisInput.getDefaultInstance())
        return this;
      switch (other.getInputSourceCase()) {
        case TEXT:
          {
            inputSourceCase_ = 1;
            inputSource_ = other.inputSource_;
            onChanged();
            break;
          }
        case INPUTSOURCE_NOT_SET:
          {
            break;
          }
      }
      this.mergeUnknownFields(other.getUnknownFields());
      onChanged();
      return this;
    }
<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