The method isDotProcessor() does not exist on PhUml\Configuration\DigraphConfiguration. Maybe you want to declare this class abstract?
(
Ignorable by Annotation
)
If this is a false-positive, you can also ignore this issue in your code via the ignore-call annotation
33
return $this->configuration->/** @scrutinizer ignore-call */ isDotProcessor() ? new DotProcessor() : new NeatoProcessor();