code: def cli_parse(parser):
      """Add method specific options to CLI parser.
  
      Parameters
      ----------
      parser : argparse object
  
      Returns
      -------
      Updated argparse object
      """
      parser.add_argument(
          "-d",
          "--delta",
          type=float,
          required=False,
          default=0.01,
          help="Finite difference step size (percent)",
      )
      return parser
  
file_path: SALib/src/SALib/sample/finite_diff.py
imports: from typing import Dict
  import numpy
  from .None import common_args
  from .None import sobol_sequence
  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