@Override
			public long count() {
				return store.size() + delegate.repository.count();
			}
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