code: def next(self, input_data: Callable) -> int:
      if self.it == 1:
          return 0
      self.it += 1
      input_data(**self.kwargs)
      return 1
  
imports: import os
  import tempfile
  import weakref
  from typing import Any, Callable, Dict, List
  import numpy
  import pytest
  from hypothesis import given, settings, strategies
  from scipy.sparse import csr_matrix
  import xgboost
  from xgboost import testing
  from xgboost.data import SingleBatchInternalIter
  from xgboost.testing import IteratorForTest, make_batches, non_increasing
label_desc: Use image node_id 2 for calling the IterForCacheTest obj's underlying member method code with example usage: obj.next(input_data) and returns: int, int