code: @Override
  	public IGenericCache putIfAbsent(String key, IGenericCache cache) {
  		return _namedCaches.putIfAbsent(key, cache);
  	}
docs: /* (non-Javadoc)
  @see com.ibm.jaggr.core.cache.ICache#putIfAbsent(java.lang.String, com.ibm.jaggr.core.cache.IGenericCache)