@Override
			public void deleteAll() {
				store.clear();
				delegate.repository.deleteAll();
			}
A throwaway repository that is used during multi-definition parsing. "Sees" definitions that are
known to the real {@link #repository} and stores new definitions in an in-memory map.

@author Eric Bottard
spring-xd-dirt/src/main/java/org/springframework/xd/dirt/stream/XDStreamParser.java