whole_func_string: function(obj) {
          var i = 0,
              items = this.items,
              len = this.length,
              item, el;
              
          for (; i < len; i++) {
              item = items[i];
              el = item.el;
              if (el) {
                  el.setStyle(obj);
              }
          }
      }
func_code_string: function(obj) {
          var i = 0,
              items = this.items,
              len = this.length,
              item, el;
              
          for (; i < len; i++) {
              item = items[i];
              el = item.el;
              if (el) {
                  el.setStyle(obj);
              }
          }
      }
func_documentation_string: Sets style for all sprites.
  @param {String} style CSS Style definition.