validateStruct example

$violations = array_merge_recursive($violations, $this->checkEntityNameConstant($definition));

            $struct = ArrayEntity::class;
            if (!$definition instanceof MappingEntityDefinition) {
                $struct = $definition->getEntityClass();
            }

            if ($struct !== ArrayEntity::class) {
                $violations[$definition->getClass()] = array_merge(
                    $violations[$definition->getClass()],
                    $this->validateStruct($struct, $definition)
                );

                $violations[$definition->getClass()] = array_merge(
                    $violations[$definition->getClass()],
                    $this->findEntityNotices($struct, $definition)
                );
            }

            $notices[$definition->getClass()] = array_merge_recursive(
                $violations[$definition->getClass()],
                $this->validateDataFieldNotPrefixedByEntityName($definition)
            );