How to use the jsbeautifier.__init__.BeautifierFlags function in jsbeautifier

def set_mode(self, mode):

        prev = BeautifierFlags('BLOCK')

        if self.flags:
            self.flag_store.append(self.flags)
            prev = self.flags

        self.flags = BeautifierFlags(mode)

        if len(self.flag_store) == 1:
            self.flags.indentation_level = 0
        else:
            self.flags.indentation_level = prev.indentation_level
            if prev.var_line and prev.var_line_reindented:
                self.flags.indentation_level = self.flags.indentation_level + 1
        self.flags.previous_mode = prev.mode

def set_mode(self, mode):

        prev = BeautifierFlags('BLOCK')

        if self.flags:
            self.flag_store.append(self.flags)
            prev = self.flags

        self.flags = BeautifierFlags(mode)

        if len(self.flag_store) == 1:
            self.flags.indentation_level = 0
        else:
            self.flags.indentation_level = prev.indentation_level
            if prev.var_line and prev.var_line_reindented:
                self.flags.indentation_level = self.flags.indentation_level + 1
        self.flags.previous_mode = prev.mode

def blank_state(self):

        # internal flags
        self.flags = BeautifierFlags('BLOCK')
        self.flag_store = []
        self.wanted_newline = False
        self.just_added_newline = False
        self.do_block_just_closed = False

        if self.opts.indent_with_tabs:
            self.indent_string = "\t"
        else:
            self.indent_string = self.opts.indent_char * self.opts.indent_size

        self.preindent_string = ''
        self.last_word = ''              # last TK_WORD seen
        self.last_type = 'TK_START_EXPR' # last token type
        self.last_text = ''              # last token text
        self.last_last_text = ''         # pre-last token text