public Builder clearProgressPercentage() {
      bitField0_ = (bitField0_ & ~0x00000004);
      progressPercentage_ = 0D;
      onChanged();
      return this;
    }
<pre>
The progress of the most recent processing update in percentage, ie. 70.0%.
</pre>

<code>double progress_percentage = 3;</code>

@return This builder for chaining.
java-texttospeech/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesizeLongAudioMetadata.java