code: function(min, max) {
      return function limitY(params) {
        params.y = clamp(params.y, min, max);
        return params;
      };
    }
docs: Return a view limiter that constrains the y parameter.
  @param {number} min The minimum y value.
  @param {number} max The maximum y value.
  @return {FlatViewLimiter}