Type->getReferencedClasses() returns a class-string

[staabm]

declaring the more precise types makes working in phpstan extension easier, as I can use more precise typing in e.g. method parameters to which I pass the result of getReferencedClasses() like

class myext {
  function doFoo() {
        foreach($classType->getReferencedClasses() as $referencedClass) {
            $this->myMethod($referencedClass);
        }
  }

  /** @param class-string $class */
  private function myMethod($class) {}
}

we could do similar stuff for Type->getObjectClassNames()

[staabm]

baselined this error, as I would otherwise have to add a @param class-string to ObjectType->construct(), which would be a BC break

[ondrejmirtes]

You can't rely on this method to return an array of class-string, precisely because of the error you baselined. That is never going away. TypeNodeResolver will happily create ObjectType for non-existent classes, and there are rules that iterate over getReferencedClasses and check if they exist or not.