code: def test_call():
      a, b, x = symbols("a, b, x", cls=Dummy)
      f = Hyper_Function([2, a], [b])
      assert f(x) == hyper([2, a], [b], x)
  
file_path: sympy/sympy/simplify/tests/test_function.py
imports: from sympy.core import symbols, Dummy, Tuple, S, Rational
  from sympy.functions import hyper
  from sympy.simplify.hyperexpand import Hyper_Function
label_desc: Use image node_id 2 for calling a global function with example usage: test_call() without return types