code: def cli_parse(parser):
      """Add method specific options to CLI parser.
  
      Parameters
      ----------
      parser : argparse object
  
      Returns
      -------
      Updated argparse object
      """
      parser.add_argument(
          "-M",
          "--m-coef",
          type=int,
          required=False,
          default=4,
          help="M coefficient, default 4",
          dest="M",
      )
  
      return parser
  
imports: import math
  import numpy
  from .None import common_args
  from ..util import scale_samples, read_param_file
label_desc: Use image node_id 2 for calling a global function with example usage: cli_parse(parser) and returns: parser