code: def test_FreeGroup__hash__():
      assert hash(F)
  
imports: from sympy.combinatorics.free_groups import free_group, FreeGroup
  from sympy.core import Symbol
  from sympy.testing.pytest import raises
  from sympy.core.numbers import oo
label_desc: Use image node_id 3 for calling a global function with example usage: test_FreeGroup__hash__() without return types