Should MutableObjectTypeAdapter be setting description?

[joelcollinsdc]

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I'm just trying to get my head around this library works, I tried adding a static type defition mapping like so:

$myStaticTypeMapper = new StaticTypeMapper();
$myStaticTypeMapper->setTypes([
	Example::class => new ExampleOutputType(),
]);
$schemaFactory->addTypeMapper($myStaticTypeMapper);

When I run SchemaPrinter::doPrint($schema);

And I get an error that there is no description set on the MutableObjectTypeAdapter that is wrapping ExampleOutputType. It appears the printer calls $def->description even though the mutable object type adapter never sets a description.

Guessing i'm trying to use the static type mapper incorrectly, but figured i'd ask, thanks!