code: function (seq) {
      if (!seq) {
        return [];
      } else if (seq instanceof Array) {
        return seq;
      } else if (isStoreCursor(seq)) {
        return seq.fetch();
      } else {
        throw badSequenceError();
      }
    }
docs: Fetch the items of `seq` into an array, where `seq` is of one of the sequence types accepted by `observe`.  If `seq` is a cursor, a dependency is established.