Pooling(kernel_size=0, stride=0, dimension=D)         output = pool(input)         print(output)          # Check backward         fn = MinkowskiAvgPoolingFunction()         self.assertTrue(             gradcheck(                 fn,                 (input.F, input.tensor_stride, pool.stride, pool.kernel_size,                  pool.dilation, pool.region_type_, pool.region_offset_, 