Extending model - Exception: Could not get value of property

[peterbenke]

Bug Report

Current Behavior
On extending the EXT:news the following exception appears:

#1546632293 RuntimeException
Could not get value of property "GeorgRinger\News\Domain\Model\NewsDefault::relatedLinks", make sure the property is either public or has a getter getRelatedLinks(), a hasser hasRelatedLinks() or an isser isRelatedLinks().

Environment

• TYPO3 version: 12.4.23
• news version: 12.0.1
• Is your TYPO3 installation set up with Composer (Composer Mode): yes
• OS: Debian GNU/Linux 11

Possible Solution
Model properties should be nullable, e.g.:

/** @var ObjectStorage<Link>|null */
#[Lazy]
protected ?ObjectStorage $relatedLinks = null;

See also:
https://docs.typo3.org/m/typo3/reference-exceptions/main/en-us/Exceptions/1546632293.html

Thank you