code: function( data ){
  
              var self = this
                  ,candidates
                  ;
  
              candidates = self.broadPhase();
  
              if ( candidates.length ){
  
                  this._world.emit( this.options.channel, {
                      candidates: candidates
                  });
              }
          }
docs: internal
  SweepPruneBehavior#sweep( data )
  - data (Object): Event data
  
  Event callback to sweep and publish event if any candidate collisions are found