ApiPlatform\SchemaGenerator\AnnotationGenerator\SerializerGroupsAnnotationGenerator::generateFieldAnnotations PHP Method

    public function generateFieldAnnotations($className, $fieldName)
    {
        $annotations = [];
        $properties = $this->config['types'][$className]['properties'];
        if (false === $this->classes[$className]['fields'][$fieldName]['isId'] && ($groups = $properties[$fieldName]['groups'])) {
            $annotations[] = sprintf('@Groups({"%s"})', implode('","', $groups));
        }
        return $annotations;
    }