@interface GKQuadtree : NSObject { void *_cQuadTree; } + (id)quadtreeWithBoundingQuad:(struct GKQuad { })a0 minimumCellSize:(float)a1; - (id)init; - (void)dealloc; - (BOOL)removeElement:(id)a0; - (id)elementsInQuad:(struct GKQuad { })a0; - (id)addElement:(SEL)a0 withPoint:(id)a1; - (id)initWithBoundingQuad:(struct GKQuad { })a0 minimumCellSize:(float)a1; - (id)addElement:(id)a0 withQuad:(struct GKQuad { })a1; - (id)elementsAtPoint:(SEL)a0; - (BOOL)removeElement:(id)a0 withNode:(id)a1; @end