code: def test_sinkhorn_no_iter(self) -> None:
      torch.manual_seed(0)
      prob = torch.rand((8, 10))
      out = msn_loss.sinkhorn(prob, iterations=0)
      self.assertTrue(torch.all(prob == out))
  
imports: import unittest
  from unittest import TestCase
  import pytest
  import torch
  import torch.nn.functional
  from pytest_mock import MockerFixture
  from torch import distributed
  from torch import nn
  from torch.optim import SGD
  from lightly.loss import msn_loss
  from lightly.loss.msn_loss import MSNLoss
  from lightly.models.modules.heads import MSNProjectionHead
label_desc: Use image node_id 7 for calling the TestMSNLossUnitTest obj's underlying member method code with example usage: obj.test_sinkhorn_no_iter() without return types