code: def test_kahane_algorithm():
      # Wrap this function to convert to and from TIDS:
  
      def tfunc(e):
          return _simplify_single_line(e)
  
      execute_gamma_simplify_tests_for_function(tfunc, D=4)
  
file_path: sympy/sympy/physics/hep/tests/test_gamma_matrices.py
imports: from sympy.matrices.dense import eye, Matrix
  from sympy.tensor.tensor import tensor_indices, TensorHead, tensor_heads, TensExpr, canon_bp
  from sympy.physics.hep.gamma_matrices import GammaMatrix, LorentzIndex, kahane_simplify, gamma_trace, _simplify_single_line, simplify_gamma_expression
  from sympy import Symbol
label_desc: Use image node_id 3 for calling a global function with example usage: test_kahane_algorithm() and returns: _simplify_single_line