How to use the @azure/ms-rest-js.HttpPipelineLogLevel.WARNING function in @azure/ms-rest-js

const requestEndTime = new Date();
      const requestCompletionTime = requestEndTime.getTime() - this.requestStartTime.getTime();
      const operationDuration = requestEndTime.getTime() - this.operationStartTime.getTime();

      let currentLevel: HttpPipelineLogLevel = HttpPipelineLogLevel.INFO;
      let logMessage: string = "";
      if (this.shouldLog(HttpPipelineLogLevel.INFO)) {
        // Assume success and default to informational logging.
        logMessage = "Successfully Received Response. ";
      }

      // If the response took too long, we'll upgrade to warning.
      if (requestCompletionTime >= this.loggingOptions.logWarningIfTryOverThreshold) {
        // Log a warning if the try duration exceeded the specified threshold.
        if (this.shouldLog(HttpPipelineLogLevel.WARNING)) {
          currentLevel = HttpPipelineLogLevel.WARNING;
          logMessage = `SLOW OPERATION. Duration > ${
            this.loggingOptions.logWarningIfTryOverThreshold
          } ms. `;
        }
      }

      if (
        (response.status >= 400 &&
          response.status <= 499 &&
          (response.status !== HTTPURLConnection.HTTP_NOT_FOUND &&
            response.status !== HTTPURLConnection.HTTP_CONFLICT &&
            response.status !== HTTPURLConnection.HTTP_PRECON_FAILED &&
            response.status !== HTTPURLConnection.HTTP_RANGE_NOT_SATISFIABLE)) ||
        (response.status >= 500 && response.status <= 509)
      ) {

const requestEndTime = new Date();
      const requestCompletionTime = requestEndTime.getTime() - this.requestStartTime.getTime();
      const operationDuration = requestEndTime.getTime() - this.operationStartTime.getTime();

      let currentLevel: HttpPipelineLogLevel = HttpPipelineLogLevel.INFO;
      let logMessage: string = "";
      if (this.shouldLog(HttpPipelineLogLevel.INFO)) {
        // Assume success and default to informational logging.
        logMessage = "Successfully Received Response. ";
      }

      // If the response took too long, we'll upgrade to warning.
      if (requestCompletionTime >= this.loggingOptions.logWarningIfTryOverThreshold) {
        // Log a warning if the try duration exceeded the specified threshold.
        if (this.shouldLog(HttpPipelineLogLevel.WARNING)) {
          currentLevel = HttpPipelineLogLevel.WARNING;
          logMessage = `SLOW OPERATION. Duration > ${
            this.loggingOptions.logWarningIfTryOverThreshold
          } ms. `;
        }
      }

      if (
        (response.status >= 400 &&
          response.status <= 499 &&
          (response.status !== HTTPURLConnection.HTTP_NOT_FOUND &&
            response.status !== HTTPURLConnection.HTTP_CONFLICT &&
            response.status !== HTTPURLConnection.HTTP_PRECON_FAILED &&
            response.status !== HTTPURLConnection.HTTP_RANGE_NOT_SATISFIABLE)) ||
        (response.status >= 500 && response.status <= 509)
      ) {
        const errorString = `REQUEST ERROR: HTTP request failed with status code: ${