public Builder setFailedCharacters(long value) {

      failedCharacters_ = value;
      bitField0_ |= 0x00000040;
      onChanged();
      return this;
    }
<pre>
Number of characters that have failed to process (Unicode codepoints) in
all documents.
</pre>

<code>int64 failed_characters = 7;</code>

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