code: def test_dims_with_size(self):
      x = dims(3)
      assert len(x) == 3 and isinstance(x[0], Dim)
  
      class Foo:
          pass
  
      y = Foo()
      z, y.x, q = dims(3)
      assert str(z) == "z"
      assert str(y.x) == "d1"
      assert str(q) == "d2"
  
imports: from functorch.dim import Tensor, Dim, dims, dimlists, stack, DimensionBindError, DimList
  from attn_ft import BertSelfAttention, Linear
  from attn_positional import BertSelfAttention
  from torch.testing._internal.common_utils import TestCase, run_tests, TEST_CUDA
  from unittest import skip, skipIf
  import torch
  import gc
  from functorch._C import dim
  from contextlib import contextmanager
  from time import perf_counter
label_desc: Use image node_id 32 for calling the TestMin obj's underlying member method code with example usage: obj.test_dims_with_size() without return types