code: function(){
              if(!this.current){
                  return this.getCurrent();
              }
  
              var index = this.targets.indexOf(this.current);
              if(index === 0){
                  index = this.targets.length - 1;
              } else {
                  index--;
              }
              this.setCurrent(this.targets[index]);
  
              return this.current;
          }
docs: Sets the object before the currently selected object to be the selected object.
  @method prev
  @return {Object} The new currently selected object.