@java.lang.Override
  public long getTotalBillableCharacters() {
    return totalBillableCharacters_;
  }
<pre>
Number of billable characters (Unicode codepoints) in documents without
clear page definition, such as XLSX.
</pre>

<code>int64 total_billable_characters = 8;</code>

@return The totalBillableCharacters.
java-translate/proto-google-cloud-translate-v3beta1/src/main/java/com/google/cloud/translate/v3beta1/BatchTranslateDocumentResponse.java