validateColumn example

$violations = [];

        foreach ($this->registry->getDefinitions() as $definition) {
            // ignore definitions from a test namespace             if (preg_match('/.*\\\\Test\\\\.*/', $definition->getClass()) || preg_match('/.*ComposerChild\\\\.*/', $definition->getClass())) {
                continue;
            }
            $violations[$definition->getClass()] = [];

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

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

            $violations = array_merge_recursive($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()],