Print grouped GOEA results into an xlsx file.

def wr_xlsx(self, fout_xlsx):
        """Print grouped GOEA results into an xlsx file."""
        objwr = WrXlsxSortedGos("GOEA", self.sortobj)
        #### fld2fmt['ratio_in_study'] = '{:>8}'
        #### fld2fmt['ratio_in_pop'] = '{:>12}'
        #### ntfld2wbfmtdict = {
        # ntfld_wbfmt = {
        #     'ratio_in_study': {'align':'right'},
        #     'ratio_in_pop':{'align':'right'}}
        kws_xlsx = {
            'title': self.ver_list,
            'fld2fmt': {f:'{:8.2e}' for f in self.flds_cur if f[:2] == 'p_'},
            #'ntfld_wbfmt': ntfld_wbfmt,
            #### 'ntval2wbfmtdict': ntval2wbfmtdict,
            #'hdrs': [],
            'prt_flds': self.flds_cur}
        objwr.wr_xlsx_nts(fout_xlsx, self.desc2nts, **kws_xlsx)