class_docstr: Test Separable Conv2D
code: def test_separable_conv2d(self):
      conv = SeparableConv2d(
          in_c=2,
          out_c=3,
          kernel_size=2,
          stride=(2, 2),
          in_f=4,
          in_t=4,
      )
      outs = conv(self.x)
      self.assertTrue(outs.shape == (1, 3, 2, 2))
  
imports: import unittest
  import torch
  from towhee.models.layers.conv2d_separable import SeparableConv2d
label_desc: Use image node_id 1 for calling the TestOperator obj's underlying member method code with example usage: obj.test_separable_conv2d() without return types