docs: function elementStyling(classDeclarations, styleDeclarations, styleSanitizer) {
      var lElement = currentElementNode;
      var tNode = lElement.tNode;
      if (!tNode.stylingTemplate) {
          // initialize the styling template.
          tNode.stylingTemplate =
              createStylingContextTemplate(classDeclarations, styleDeclarations, styleSanitizer);
      }
      if (styleDeclarations && styleDeclarations.length ||
          classDeclarations && classDeclarations.length) {
          elementStylingApply(tNode.index - HEADER_OFFSET);
      }
  }