code: def assert_plot_func(plot_func: Callable) -> None:
      """
      Assert that the plot function is a callable.
  
      Parameters
      ----------
      plot_func: callable
          An plot function input, asusmed to be a Callable.
  
      Returns
      -------
      None
      """
      assert callable(
          plot_func
      ), "Make sure that 'plot_func' is a callable."
  
file_path: Quantus/quantus/helpers/asserts.py
imports: from typing import Callable, Tuple, Sequence, Union
  import numpy
label_desc: Use image node_id 8 for calling a global function with example usage: assert_plot_func(plot_func) without return types