code: public synchronized void putAll(Map<? extends String, ? extends XAttribute> t) {
  		if(t.size() > 0) {
  			if(backingStore == null) {
  				try {
  					backingStore = backingStoreClass.newInstance();
  				} catch (Exception e) {
  					// Fuckup
  					e.printStackTrace();
  				}
  			}
  			backingStore.putAll(t);
  		}
  	}
docs: /* (non-Javadoc)
  @see java.util.Map#putAll(java.util.Map)