how to check returned data is collection or not in laravel code example

Example: laravel check if query builder is empty

@if ($query === null)
    {
        <h4 style="text-transform: lowercase;">no results for: #{{ $query }}</h4>
        }
    @else 
    {
                <h4 style="text-transform: lowercase;">results for: #{{ $query }}</h4>
        }
        @endif