} elseif (self::isRegularArray($parameter->getUnionType())) {
                if ($function->getFQSEN()->isClosure()) {
                    $issue = 'PhanPluginUnknownArrayClosureParamType';
                    $message = 'Closure {FUNCTION} has a parameter type of array for ${PARAMETER}, but does not specify any key types or value types';
                } else {