map data

$names = [];
foreach($entities as $entity) {
    $names[] = $entity->getName();
}

to

$names = array_map(function(Entity $entity): string {
    return $entity->getName();
},$entities);

map data (with keys)

$names = [];
foreach($entities as $index => $entity) {
    $names[] = $this->service->getName($entity, $index);
}

to

$names = array_map(function(int $key, Entity $entity): string {
    return $this->service->getName($entity, $index);
},array_keys($entities), $entities);