public Builder clearFailedPages() {
      bitField0_ = (bitField0_ & ~0x00000008);
      failedPages_ = 0L;
      onChanged();
      return this;
    }
<pre>
Number of pages that failed to process in all documents so far. Documents
without clear page definition (such as XLSX) are not counted.
</pre>

<code>int64 failed_pages = 4;</code>

@return This builder for chaining.
java-translate/proto-google-cloud-translate-v3beta1/src/main/java/com/google/cloud/translate/v3beta1/BatchTranslateDocumentMetadata.java