@Override
			public <S extends BaseDefinition> S save(S entity) {
				store.put(entity.getName(), entity);
				return entity;
			}
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