public static Stella_Object walkBooleanTree(Cons tree, Object [] MV_returnarray) {
    { Stella_Object otree = Cons.helpWalkBooleanTree(tree);

      if (Stella_Object.proceduralExpressionP(otree)) {
        otree = Cons.percolateOutBooleanVrletExpressions(((Cons)(otree)));
      }
      { Stella_Object _return_temp = otree;

        MV_returnarray[0] = Stella.SGT_STELLA_BOOLEAN;
        return (_return_temp);
      }
    }
  }