code: function directiveIsMultiElement(name) {
        if (hasDirectives.hasOwnProperty(name)) {
          for (var directive, directives = $injector.get(name + Suffix),
              i = 0, ii = directives.length; i < ii; i++) {
            directive = directives[i];
            if (directive.multiElement) {
              return true;
            }
          }
        }
        return false;
      }
docs: looks up the directive and returns true if it is a multi-element directive,
  and therefore requires DOM nodes between -start and -end markers to be grouped
  together.
  
  @param {string} name name of the directive to look up.
  @returns true if directive was registered as multi-element.