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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _check_section_option(self, section, option):

 """
 Private method to check section and option types
 """

        if section is None:
            section = self.DEFAULT_SECTION_NAME
        elif not is_text_string(section):
            raise RuntimeError("Argument 'section' must be a string")
        if not is_text_string(option):
            raise RuntimeError("Argument 'option' must be a string")
        return section