public Builder mergeErrorTrace(com.google.cloud.websecurityscanner.v1.ScanRunErrorTrace value) {
      if (errorTraceBuilder_ == null) {
        if (((bitField0_ & 0x00000080) != 0)
            && errorTrace_ != null
            && errorTrace_
                != com.google.cloud.websecurityscanner.v1.ScanRunErrorTrace.getDefaultInstance()) {
          getErrorTraceBuilder().mergeFrom(value);
        } else {
          errorTrace_ = value;
        }
      } else {
        errorTraceBuilder_.mergeFrom(value);
      }
      if (errorTrace_ != null) {
        bitField0_ |= 0x00000080;
        onChanged();
      }
      return this;
    }
<code>.google.cloud.websecurityscanner.v1.ScanRunErrorTrace error_trace = 8;</code>
java-websecurityscanner/proto-google-cloud-websecurityscanner-v1/src/main/java/com/google/cloud/websecurityscanner/v1/ScanRunLog.java