signifly / laravel-builder-macros

src/macros/joinRelation.php

<?php

use Illuminate\Database\Eloquent\Builder;

Builder::macro('joinRelation', function (string $relationName, $operator = '=') {
    $relation = $this->getRelation($relationName);

The variable $this seems to be never defined.

    return $this->join(
        $relation->getRelated()->getTable(),
        $relation->getQualifiedForeignKeyName(),
        $operator,
        $relation->getQualifiedOwnerKeyName()
    );
});