@java.lang.Override
  public long getTotalBillablePages() {
    return totalBillablePages_;
  }
<pre>
Number of billable pages in documents with clear page definition (such as
PDF, DOCX, PPTX) so far.
</pre>

<code>int64 total_billable_pages = 5;</code>

@return The totalBillablePages.
java-translate/proto-google-cloud-translate-v3beta1/src/main/java/com/google/cloud/translate/v3beta1/BatchTranslateDocumentMetadata.java