create a duplicate of query without altering original laravel code example

Example 1: laravel collection remove duplicates

$unique = $collection->unique();

Example 2: laravel collection find duplicates

$users = Users::all();
$usersUnique = $users->unique('id');
$usersDupes = $users->diff($usersUnique);

dd($users, $usersUnique, $usersDupes);