Error in nagios.api.php hook_nagios example

Problem/Motivation

I created a small custom nagios module with drush gen and for hook implementation it took example code from nagios.api.php but I got errors because of missing array keys. I figured out that the hook example fits to the internal functions in nagios.module which are called from own hook implementation nagios_nagios() but doesn't work for hook implementation in other modules.

Steps to reproduce

Use Example code as described in nagios.api.php:

return [
    'key' => 'IDENTIFIER',
    // This identifier will appear on Nagios' monitoring pages and alerts.
    'data' => $data,
];

Proposed resolution

Use this code and the data are processed properly:

return [
    'IDENTIFIER' => $data,
];

Remaining tasks

Change nagios.api.php acdording to how the hook data are currently processed. Maybe check documentation and update if needes.

User interface changes

No.

API changes

No.

Data model changes

No.