public Builder clearMarkName() {
      markName_ = getDefaultInstance().getMarkName();
      bitField0_ = (bitField0_ & ~0x00000001);
      onChanged();
      return this;
    }
<pre>
Timepoint name as received from the client within `&lt;mark&gt;` tag.
</pre>

<code>string mark_name = 4;</code>

@return This builder for chaining.
java-texttospeech/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/Timepoint.java