Configuration interface to be implemented by most listable bean factories. In addition to ConfigurableBeanFactory, it provides facilities to analyze and modify bean definitions, and to pre-instantiate singletons.

This subinterface of BeanFactory is not meant to be used in normal application code: Stick to BeanFactory or ListableBeanFactory for typical use cases. This interface is just meant to allow for framework-internal plug'n'play even when needing access to bean factory configuration methods.