code: def compose(*parameter_functions):
    
    def composed_fn(var_name, variable, phase):
      for fn in parameter_functions:
        variable = fn(var_name, variable, phase)
      return variable
    return composed_fn
docs: Composes multiple modification functions in order.
  
    Args:
      *parameter_functions: The functions to compose.
  
    Returns:
      A parameter modification function that consists of applying all the provided
      functions.