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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 _initLayerCtors(self):
        '''
        Registration for built-in Layer ctors
        '''
        ctors = {
            'lmdb': s_lmdblayer.LmdbLayer,
            'remote': s_remotelayer.RemoteLayer,
        }
        self.layrctors.update(**ctors)