def set_option(self, optname, value, action=None, optdict=None):
        """method called to set an option (registered in the options list)

        overridden to report options setting to Similar
        """
        BaseChecker.set_option(self, optname, value, action, optdict)
        if optname == "min-similarity-lines":
            self.min_lines = self.config.min_similarity_lines
        elif optname == "ignore-comments":
            self.ignore_comments = self.config.ignore_comments
        elif optname == "ignore-docstrings":
            self.ignore_docstrings = self.config.ignore_docstrings
        elif optname == "ignore-imports":
            self.ignore_imports = self.config.ignore_imports
method called to set an option (registered in the options list)

        overridden to report options setting to Similar