code: def test_ceil(self):
      class SimpleOp(nn.Module):
          def forward(self, x):
              out1 = x.ceil()
              return out1
  
      self.checkExportImport(SimpleOp(), (torch.randn(4),))
  
imports: import unittest
  import torch
  import nni.nas.nn.pytorch.layers
  from .convert_mixin import ConvertMixin, ConvertWithShapeMixin
label_desc: Use image node_id 21 for calling the TestConvert obj's underlying member method code with example usage: obj.test_ceil() and returns: out1