Illuminate\Database\Eloquent\Builder::nestWhereSlice PHP Method

    protected function nestWhereSlice($whereSlice, $boolean = 'and')
    {
        $whereGroup = $this->getQuery()->forNestedWhere();
        $whereGroup->wheres = $whereSlice;
        return ['type' => 'Nested', 'query' => $whereGroup, 'boolean' => $boolean];
    }