code: function isRegion(virtualNode) {
  	const node = virtualNode.actualNode;
  	const explicitRole = axe.commons.aria.getRole(node, { noImplicit: true });
  	const ariaLive = (node.getAttribute('aria-live') || '').toLowerCase().trim();
  
  	if (explicitRole) {
  		return explicitRole === 'dialog' || landmarkRoles.includes(explicitRole);
  	}
  	// Ignore content inside of aria-live
  	if (['assertive', 'polite'].includes(ariaLive)) {
  		return true;
  	}
  
  	// Check if the node matches any of the CSS selectors of implicit landmarks
  	return implicitLandmarks.some(implicitSelector => {
  		let matches = axe.utils.matchesSelector(node, implicitSelector);
  		if (node.nodeName.toUpperCase() === 'FORM') {
  			let titleAttr = node.getAttribute('title');
  			let title =
  				titleAttr && titleAttr.trim() !== ''
  					? axe.commons.text.sanitize(titleAttr)
  					: null;
  			return matches && (!!aria.labelVirtual(virtualNode) || !!title);
  		}
  		return matches;
  	});
  }
docs: Check if the current element is a landmark