code: function descendantText(nodeName, { actualNode }, context) {
  	nodeName = nodeName.toLowerCase();
  	// Prevent accidently getting the nested element, like:
  	// fieldset > fielset > legend (1st fieldset has no legend)
  	const nodeNames = [nodeName, actualNode.nodeName.toLowerCase()].join(',');
  	const candidate = actualNode.querySelector(nodeNames);
  
  	if (!candidate || candidate.nodeName.toLowerCase() !== nodeName) {
  		return '';
  	}
  	return text.accessibleText(candidate, context);
  }
docs: Get the accessible text of first matching node
  IMPORTANT: This method does not look at the composed tree
  @private