static [UAnimBlueprintExtension](API\Editor\AnimGraph\UAnimBlueprintExtension) * RequestExtension ( [UAnimBlueprint](API\Runtime\Engine\Animation\UAnimBlueprint) * InAnimBlueprint, [TSubclassOf](API\Runtime\CoreUObject\Templates\TSubclassOf)< [UAnimBlueprintExtension](API\Editor\AnimGraph\UAnimBlueprintExtension) > InExtensionType )