private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.websecurityscanner.v1beta.ScanRunErrorTrace,
            com.google.cloud.websecurityscanner.v1beta.ScanRunErrorTrace.Builder,
            com.google.cloud.websecurityscanner.v1beta.ScanRunErrorTraceOrBuilder>
        getErrorTraceFieldBuilder() {
      if (errorTraceBuilder_ == null) {
        errorTraceBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.websecurityscanner.v1beta.ScanRunErrorTrace,
                com.google.cloud.websecurityscanner.v1beta.ScanRunErrorTrace.Builder,
                com.google.cloud.websecurityscanner.v1beta.ScanRunErrorTraceOrBuilder>(
                getErrorTrace(), getParentForChildren(), isClean());
        errorTrace_ = null;
      }
      return errorTraceBuilder_;
    }
<pre>
If result_state is an ERROR, this field provides the primary reason for
scan's termination and more details, if such are available.
</pre>

<code>.google.cloud.websecurityscanner.v1beta.ScanRunErrorTrace error_trace = 10;</code>
java-websecurityscanner/proto-google-cloud-websecurityscanner-v1beta/src/main/java/com/google/cloud/websecurityscanner/v1beta/ScanRun.java