docs: function(node){
      var test = null;
      if ('default' != node.expr) {
        test = node.astExpr || this.parseExpr(node.expr);
      }
      var consequent = []
      if (node.block) {
        consequent = this.visit(node.block, node);
        consequent.push(t.breakStatement());
      }
      var c = t.switchCase(test, consequent);
      return [c];
    }