code: function mapExistingElement(name) {
        if (metaElements[name]) {
          return true;
        }
  
        var element = document.getElementsByName(name)[0];
  
        if (!element) {
          return false;
        }
  
        metaElements[name] = angular.element(element);
  
        return true;
      }
docs: Checks if the requested element was written manually and maps it
  
  @param {string} name meta tag 'name' attribute value
  @returns {boolean} returns true if there is an element with the requested name