code: def _ids_and_column_names(names, force_lower_case=False):
          
          fixed = OrderedDict()
          for name in names:
              identifier = RowWrapper._make_identifier(name)
              if force_lower_case:
                  identifier = identifier.lower()
              while identifier in fixed:
                  identifier = RowWrapper._increment_numeric_suffix(identifier)
              fixed[identifier] = name
          return fixed
docs: Ensure all column names are unique identifiers.