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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 header(self):
        '''
        Displays the scan header, as defined by self.HEADER and self.HEADER_FORMAT.

        Returns None.
        '''
        self.config.display.format_strings(self.HEADER_FORMAT, self.RESULT_FORMAT)
        self.config.display.add_custom_header(self.VERBOSE_FORMAT, self.VERBOSE)

        if type(self.HEADER) == type([]):
            self.config.display.header(*self.HEADER, file_name=self.current_target_file_name)
        elif self.HEADER:
            self.config.display.header(self.HEADER, file_name=self.current_target_file_name)