def set_diag_color(self, diag_color):
        self.diag_color = self._get_color(diag_color)
Like ``ngettext()``, but look the message up in the specified
dataset/ETHPy150Open jmcnamara/XlsxWriter/xlsxwriter/format.py/Format.set_diag_color--crossover with--dataset/ETHPy150Open lad1337/XDM/site-packages/babel/support.py/NullTranslations.dngettext