code: def _test_combinations_assoc():
      assert set(allcombinations((1, 2, 3), (a, b), True)) == {
          (((1, 2), (3,)), (a, b)),
          (((1,), (2, 3)), (a, b)),
      }
  
file_path: sympy/sympy/unify/tests/test_unify.py
imports: from sympy.unify.core import Compound, Variable, CondVariable, allcombinations
  from sympy.unify import core
label_desc: Use image node_id 8 for calling a global function with example usage: _test_combinations_assoc() without return types