code: function(id) {
          if (!arguments.length) { return this.dom().id; }
          if (this.dom().id) { view.unregisterId(this); }
          this.dom().id = id;
          view.registerId(this);
          return this;
      }
docs: Used for fast (on hash lookup) view searches: build('#view_id');
  
  @param {string=} id New id value
  @returns {string|view.Base} current id or self