docs: public static <T> EventScope<T> register (final EventScope<T> pScope) {
  
          if (pScope.getBaseClass () == null) {
              throw new IllegalArgumentException ("with public event scopes, base types are mandatory");
          }
  
          if (null != get (pScope.getBaseClass ())) {
              throw new IllegalArgumentException ("already registered to type " + pScope.getBaseClass ());
          }
  
          sScopes.put (pScope.getBaseClass () , pScope);
  
          return pScope;
  
      }