code: def __sequenceDescendingStrict(l):
      "Test a sequences values to be in strictly descending order."
      it = iter(l)
      next(it)
      if not all(b < a for a, b in zip(l, it)):
          raise argparse.ArgumentTypeError(
              "All values must be given in strictly descending order."
          )
      return l
  
imports: import argparse
  import itertools
  import os
label_desc: Use image node_id 19 for calling a global function with example usage: __sequenceDescendingStrict(l) and returns: l