loadToOne example

 EntityCollection {
        if ($collection->count() <= 0) {
            return $collection;
        }

        foreach ($fields as $association) {
            if (!$association instanceof AssociationField) {
                continue;
            }

            if ($association instanceof OneToOneAssociationField || $association instanceof ManyToOneAssociationField) {
                $this->loadToOne($association, $context, $collection, $criteria, $partial[$association->getPropertyName()] ?? []);

                continue;
            }

            if ($association instanceof OneToManyAssociationField) {
                $this->loadOneToMany($criteria, $definition, $association, $context, $collection, $partial[$association->getPropertyName()] ?? []);

                continue;
            }

            if ($association instanceof ManyToManyAssociationField) {