interface SMUIDataTableHeaderCellAccessor {
  _smui_data_table_header_cell_accessor: true;
  readonly columnId: string;
}

interface SMUIDataTableBodyCellAccessor {
  _smui_data_table_header_cell_accessor: false;
  readonly columnId: undefined;
}

export type SMUIDataTableCellAccessor = (
  | SMUIDataTableHeaderCellAccessor
  | SMUIDataTableBodyCellAccessor
) & {
  readonly element: HTMLTableCellElement;
  addClass(className: string): void;
  removeClass(className: string): void;
  getAttr(name: string): string | null;
  addAttr(name: string, value: string): void;
};