code: function (dimensions) {
                  return {
                      x: this.limitRoles.includes('left') ? 0 : dimensions.width - this.width / 2,
                      y: this.limitRoles.includes('top') ? 0 : dimensions.height - this.height / 2
                  };
              }
docs: calculates the initial positions of the point by it's roles
  @private
  @param {?} dimensions - dimensions of the pane in which the point is located
  @return {?}