i want to ask about how to implement multiple heading in maatwebsite
here is may code
public function headings(): array
{
$mapel = DB::table('tb_mapel')->select('nama_mapel')->get()->toArray();
return [
['LEGER'],
['', '', 'KI3 (Pengetahuan)'],
['NIS', 'Nama Siswa', $mapel],
];
}
this is the the result of code:
And this is what i want

