docs: def set_value_for_keypath(item, keypath, value, create_if_needed=False, delimeter='.'):
      """
      Sets the value for a keypath in a dictionary
      if the keypath exists. This modifies the
      original dictionary.
      """
  
      if len(keypath) == 0:
          return None
  
      keys = keypath.split(delimeter)
      if len(keys) > 1:
          key = keys[0]
  
          if create_if_needed:
              item[key] = item.get(key, {})
  
          if key in item:
              if set_value_for_keypath(item[key], delimeter.join(keys[1:]), value,
                                       create_if_needed=create_if_needed, delimeter=delimeter):
                  return item
  
          return None
  
      if create_if_needed:
          item[keypath] = item.get(keypath, {})
  
      if keypath in item:
          item[keypath] = value
          return item
      else:
          return None