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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def init_submodules(self, cache):
 """cache = path or bool"""

    self.cache = CacheService(cache, weakref.proxy(self)) 
    self.mesh = PrecomputedMeshService(weakref.proxy(self))
    self.skeleton = PrecomputedSkeletonService(weakref.proxy(self))