+ _columns = []
+ _hidden_columns = []
+
+ print "_columns=", _columns
+ self.columns = { self.MAP.get(c, c) : c for c in _columns }
+ self.hidden_columns = { self.MAP.get(c, c) : c for c in _hidden_columns }
+ print "self.columns", self.columns
+
+ self.init_key=init_key