PHP warning from OpenApiDataMockerRouteMiddleware.phpL90 due to callback returning false

[anttikuuskoski]

The code in

openapi-data-mocker-server-middleware/src/Mock/OpenApiDataMockerRouteMiddleware.php

Line 90 in c6d05e0

if (array_key_exists($mockedStatusCode, $this->responses)) {

results in a PHP warning:

Warning: array_key_exists(): The first argument should be either a string or an integer in ybelenko\openapi-data-mocker-server-middleware\src\Mock\OpenApiDataMockerRouteMiddleware.php on line 90

The empty callback return value comes (for example) from an enabled (uncommented) but unused mock setup in https://github.com/OpenAPITools/openapi-generator/blob/349445ab0102eefb0c086a74f7be4381b1ba9c0f/modules/openapi-generator/src/main/resources/php-slim4-server/config_example.mustache#L75

So the issue might belong to the other repo as well, but as I think the callback handler should be prepared for unexpected return values, I'm placing the issue here. Please do close / move if inappropriate.