static public <T>void reset(@Nonnull Class<T> type){
  log.debug("Reset type {}",type.getName());
  managerLists.put(type,new ArrayList<>());
}

static public < T > void reset ( @ Nonnull Class < T > type ) { log . debug ( "Reset type {}" , type . getName ( ) ) ; managerLists . put ( type , new ArrayList < > ( ) ) ; }
deregister all objects of a particular type .
