PHP Fatal error: Uncaught Error: Object of class PhpParser\Node\UnionType could not be converted to string in /vendor/php-censor/phpdoc-checker/src/FileProcessor.php:173

[kaurov]

PHPDOCCHECK 
PHPDoc Checker
PHP Fatal error:  Uncaught Error: Object of class PhpParser\Node\UnionType could not be converted to string in /vendor/php-censor/phpdoc-checker/src/FileProcessor.php:173

was caused by:
public function getInstance(Class1|Class2 $item = null): self

and temporarily fixed by

• either removal of null:
  public function getInstance(Class1|Class2 $item): self

• either adding the null to types:
  public function factoryMethod(Class1|Class2|null $item = null): self

Acceptance Criteria:
PHPDoc Checker can read functions with union typed properties without the causing PHP error and output readable notice about deveoper's error. Something like:
Please add |null to $item in getInstance() to be able to set the value = null.