code: function() {
              var result = "";
              var properties = $.Placement.properties[this.placement];
              if (!properties) {
                  return result;
              }
              if (properties.isLeft) {
                  result = "left";
              } else if (properties.isRight) {
                  result = "right";
              }
              if (properties.isTop) {
                  result += " top";
              } else if (properties.isBottom) {
                  result += " bottom";
              }
              return result;
          }
docs: private