import { TableFactory, TableModelIf, TableOptions, TableOptionsIf } from "@guiexpert/table"; tableModel: TableModelIf = TableFactory.createTableModel({ headerData ...
Tl;dr: See a minimal repro with root-cause, explanation, and potential fix here: https://stackblitz.com/edit/angular-material-table-multiple-header-rows-nj2ljf?file ...