code: function (el) {
      var i;
      var intersection;
      for (i = 0; i < this.intersections.length; i++) {
        intersection = this.intersections[i];
        if (intersection.object.el === el) { return intersection; }
      }
      return null;
    }
docs: Return the most recent intersection details for a given entity, if any.
  @param {AEntity} el
  @return {Object}