code: def assert_sizes_triplet(self, losses, loss_indices):
      assert torch.is_tensor(losses)
      assert c_f.is_list_or_tuple(loss_indices)
      assert len(loss_indices) == 3
      assert all(len(x) == len(losses) for x in loss_indices)
  
imports: import torch
  from ..utils import common_functions
  from ..utils.module_with_records import ModuleWithRecords
label_desc: Use image node_id 19 for calling the BaseReducer obj's underlying member method code with example usage: obj.assert_sizes_triplet(losses, loss_indices) without return types