code: function (params) {
          params = _.extend({
              anchor: {
                  x: 0.5,
                  y: 0.5
              }
          }, params);
  
          this.$id = 'collision';
          this.$deps = ['position'];
  
          this.width = params.width;
          this.height = params.height;
          this.anchor = params.anchor;
      }
docs: Represents the collision boundaries of an entity.