docs: function ()
          {
              var mask = this.mask;
              var included =
              _Array_prototype_every.call
              (
                  arguments,
                  function (arg)
                  {
                      var otherMask = validMaskFromArrayOrStringOrFeature(arg);
                      var result = maskIncludes(mask, otherMask);
                      return result;
                  }
              );
              return included;
          }