public Builder setTotalBillableCharacters(long value) {

      totalBillableCharacters_ = value;
      bitField0_ |= 0x00000100;
      onChanged();
      return this;
    }
<pre>
Number of billable characters (Unicode codepoints) in documents without
clear page definition (such as XLSX) so far.
</pre>

<code>int64 total_billable_characters = 9;</code>

@param value The totalBillableCharacters to set.
@return This builder for chaining.
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/BatchTranslateDocumentMetadata.java