code: def diffev_chebyshev(x0, *args, **kwds):
      # Differential Evolution solver
      from optimize_helper import diffev as the_solver
  
      # Chebyshev cost function
      from poly import chebyshev4cost as the_model
  
      return the_solver(the_model, x0, monitor=True, *args, **kwds)
  
label_desc: Use image node_id 2 for calling a global function with example usage: diffev_chebyshev(x0) and returns: the_solver