code: def test_replacer():
      if matchpy is None:
          skip("matchpy not installed")
  
      for info in [True, False]:
          for lambdify in [True, False]:
              _perform_test_replacer(info, lambdify)
  
file_path: sympy/sympy/utilities/tests/test_matchpy_connector.py
imports: import pickle
  from sympy.core.relational import Eq, Ne
  from sympy.core.singleton import S
  from sympy.core.symbol import symbols
  from sympy.functions.elementary.miscellaneous import sqrt
  from sympy.functions.elementary.trigonometric import cos, sin
  from sympy.external import import_module
  from sympy.testing.pytest import skip
  from sympy.utilities.matchpy_connector import WildDot, WildPlus, WildStar, Replacer
label_desc: Use image node_id 4 for calling a global function with example usage: test_replacer() without return types