private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.websecurityscanner.v1.ScanConfigError,
            com.google.cloud.websecurityscanner.v1.ScanConfigError.Builder,
            com.google.cloud.websecurityscanner.v1.ScanConfigErrorOrBuilder>
        getScanConfigErrorFieldBuilder() {
      if (scanConfigErrorBuilder_ == null) {
        scanConfigErrorBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.websecurityscanner.v1.ScanConfigError,
                com.google.cloud.websecurityscanner.v1.ScanConfigError.Builder,
                com.google.cloud.websecurityscanner.v1.ScanConfigErrorOrBuilder>(
                getScanConfigError(), getParentForChildren(), isClean());
        scanConfigError_ = null;
      }
      return scanConfigErrorBuilder_;
    }
<pre>
Output only. If the scan encounters SCAN_CONFIG_ISSUE error, this field has the error
message encountered during scan configuration validation that is performed
before each scan run.
</pre>

<code>.google.cloud.websecurityscanner.v1.ScanConfigError scan_config_error = 2;</code>
java-websecurityscanner/proto-google-cloud-websecurityscanner-v1/src/main/java/com/google/cloud/websecurityscanner/v1/ScanRunErrorTrace.java