old_contents: from essl import exec
  from essl import vars
  
  def call(method, args):
      stack = []
      for arg in args:
          stack.append(vars.get_var(args))
      return essl.exec(vars.functions[method], stack)
  
new_contents: from essl import exec
  from essl import vars
  
  def call(method, args):
      stack = []
      for arg in args:
          stack.append(vars.get_var(args))
          
      return essl.exec(vars.functions[method], stack)
  
subject: Update call.py