Assertion: concept's type | /r/HasProperty | subclassed by application
Facets:
Source sentences:
text: Factory objects are common in toolkits and frameworks where library code needs to create objects of types which may be subclassed by applications using the framework.
text: Factories, specifically factory methods, are common in toolkits and frameworks, where library code needs to create objects of types that may be subclassed by applications using the framework.