ref nullable false

[root-aza]

Minimal repoduce:

{
 "openapi": "3.1.0",
 "info": {
 "title": "Test",
 "description": "Test",
 "version": "1.0"
 },
 "components": {
 "schemas": {
 "Test": {
 "type": "object",
 "properties": {
 "A": {
 "$ref": "#/components/schemas/TestB",
 "nullable": true
 }
 }
 },
 "TestB": {
 "type": "object",
 "properties": {
 "join": {
 "type": "string"
 }
 }
 }
 }
 }
}

Test case

<?php

declare(strict_types=1);

require __DIR__ . '/vendor/autoload.php';

use cebe\openapi\Reader;

$openapi = Reader::readFromJsonFile(realpath('openapi.json'));

assert($openapi->components->schemas['Test']->properties['A']->nullable == true, 'Property A is not null');

[cebe]

Current implementation does not fully support OpenAPI 3.1.