public com.google.protobuf.ByteString getFieldNameBytes() {
      java.lang.Object ref = fieldName_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        fieldName_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
Indicates the full name of the ScanConfig field that triggers this error,
for example "scan_config.max_qps". This field is provided for
troubleshooting purposes only and its actual value can change in the
future.
</pre>

<code>string field_name = 2;</code>

@return The bytes for fieldName.
java-websecurityscanner/proto-google-cloud-websecurityscanner-v1beta/src/main/java/com/google/cloud/websecurityscanner/v1beta/ScanConfigError.java