code: @Override
      public Object getCollection(Object coll, String key) throws PageException {
  	return variableUtil.getCollection(this, coll, key);
      }
docs: /*
  private Object _touch(Scope scope, String key) throws PageException { Object
  o=scope.get(key,null); if(o!=null) return o; return scope.set(key, new StructImpl()); }