code: def imsave(filename, img):
      """
      imsave(filename, img)
  
      Save image to disk
  
      Image type is inferred from filename
  
      Implementation is based on FreeImage.
  
      Parameters
      ----------
        filename : file name
        img : image to be saved as nd array
      """
      write(img, filename)
  
imports: import sys
  import os
  import ctypes
  import ctypes.util
  import numpy
label_desc: Use image node_id 15 for calling a global function with example usage: imsave(filename, img) without return types