code/datums/ai/generic_behaviors/drag_target.dm

/datum/bt_node/ai_behavior/drag_target	BT-native drag behavior. Moves to the target and starts pulling it. If already pulling the target, returns SUCCESS immediately (idempotent). Does NOT clear the target key on finish callers must clear it when done. Use move_to_target after this to drag the pulled mob/item to a destination.