How to use the ember-a11y-testing/utils/format-violation function in ember-a11y-testing

let nodeElem;
          let classNamesToAdd;
          for (let i = 0, l = violations.length; i < l; i++) {
            violation = violations[i];

            nodes = violation.nodes;

            if (isEmpty(nodes) || nodes.length === 0) {
              console.error(formatViolation(violation), violation); // eslint-disable-line no-console
              violationsHelper.push(violation);
            }

            for (let j = 0, k = nodes.length; j < k; j++) {
              nodeData = nodes[j];

              console.error(formatViolation(violation, nodeData.html), violation); // eslint-disable-line no-console
              violationsHelper.push(violation);

              if (nodeData) {
                nodeElem = document.querySelector(nodeData.target.join(','));
                classNamesToAdd = isBackgroundReplacedElement(nodeElem) ? [VIOLATION_CLASS_MAP.REPLACED_ELEMENT] : violationClasses;

                nodeElem.classList.remove(...VIOLATION_CLASS_NAMES);

                if (visualNoiseLevel > 0) {
                  nodeElem.classList.add(...classNamesToAdd);
                }
              }
            }
          }

          if (this.axeCallback) {

function a11yAuditCallback(results) {
  let violations = results.violations;

  if (violations.length) {
    let allViolations = [];

    for (let i = 0, l = violations.length; i < l; i++) {
      let violation = violations[i];
      let violationNodes = violation.nodes.map(node => node.html);

      let violationMessage = formatViolation(violation, violationNodes);
      allViolations.push(violationMessage);

      console.error(violationMessage, violation);  // eslint-disable-line no-console
      violationsHelper.push(violation);
    }

    let allViolationMessages = allViolations.join('\n');
    assert(`The page should have no accessibility violations. Violations:\n${allViolationMessages}`);
  }
}

const violations = results.violations;
          const violationClasses = this.get('violationClasses') || [];
          const visualNoiseLevel = this.get('visualNoiseLevel');

          let violation;
          let nodes;
          let nodeData;
          let nodeElem;
          let classNamesToAdd;
          for (let i = 0, l = violations.length; i < l; i++) {
            violation = violations[i];

            nodes = violation.nodes;

            if (isEmpty(nodes) || nodes.length === 0) {
              console.error(formatViolation(violation), violation); // eslint-disable-line no-console
              violationsHelper.push(violation);
            }

            for (let j = 0, k = nodes.length; j < k; j++) {
              nodeData = nodes[j];

              console.error(formatViolation(violation, nodeData.html), violation); // eslint-disable-line no-console
              violationsHelper.push(violation);

              if (nodeData) {
                nodeElem = document.querySelector(nodeData.target.join(','));
                classNamesToAdd = isBackgroundReplacedElement(nodeElem) ? [VIOLATION_CLASS_MAP.REPLACED_ELEMENT] : violationClasses;

                nodeElem.classList.remove(...VIOLATION_CLASS_NAMES);

                if (visualNoiseLevel > 0) {