Controls contact recycling for this body. Enabled by default. Contact recycling reuses contact manifolds when bodies move only slightly, improving performance. Disabling it can avoid ghost collisions, at the cost of higher simulation time. Both bodies in a contact must have recycling enabled for that contact to be recycled. Existing contacts retain their prior setting; only contacts created after a change will be recycled. See PhysicsBodyDefinition.contactRecyclingAllowed.