code: def _define_problem_with_groups(problem: Dict) -> Dict:
      """
      Checks if the user defined the 'groups' key in the problem dictionary.
      If not, makes the 'groups' key equal to the variables names. In other
      words, the number of groups will be equal to the number of variables, which
      is equivalent to no groups.
  
      Parameters
      ----------
      problem : dict
          The problem definition
  
      Returns
      -------
      problem : dict
          The problem definition with the 'groups' key, even if the user doesn't
          define it
      """
      # Checks if there isn't a key 'groups' or if it exists and is set to 'None'
      if "groups" not in problem or not problem["groups"]:
          problem["groups"] = problem["names"]
      elif len(problem["groups"]) != problem["num_vars"]:
          raise ValueError(
              "Number of entries in 'groups' should be the same "
              "as in 'names'"
          )
      return problem
  
file_path: SALib/src/SALib/util/__init__.py
imports: from collections import OrderedDict
  from typing import Dict, Tuple
  import warnings
  import numpy
  import scipy
  from typing import List
  from .util_funcs import avail_approaches, read_param_file, _check_bounds, _check_groups
  from .problem import ProblemSpec
  from .results import ResultDict
label_desc: Use image node_id 7 for calling a global function with example usage: _define_problem_with_groups(problem) and returns: problem