how to use as in query builder in laravel code example

Example 1: Laravel query builder toSql

$query = DB::table('table')->whereIn('some_field', [1,2,30]);

$sql = $query->toSql();

$bindings = $query->getBindings();

Example 2: query builder laravel

use Illuminate\Database\Eloquent\Builder;

public function scopeFakePersons(Builder $query): Builder
{
  return $query->where('is_fake', 1);
}