code: function( aabb ){
  
              if (!aabb) {
                  throw 'Error: aabb not set';
              }
  
              this._edges = {
                  min: {
                      x: (aabb.x - aabb.hw),
                      y: (aabb.y - aabb.hh)
                  },
                  max: {
                      x: (aabb.x + aabb.hw),
                      y: (aabb.y + aabb.hh)
                  }
              };
  
              return this;
          }
docs: EdgeCollisionDetectionBehavior#setAABB( aabb ) -> this
  - aabb (Physics.aabb): The aabb to use as the boundary
  
  Set the boundaries of the edge.