By now, the code in Listing 17 should be old hat to you.
现在,清单17中的代码对您来说太陈旧了。
Before you can change the button「s label, though, you need to get access to the node; and before you can do that, you need an ID to reference the button by. This should be old hat by now, right?
在修改按钮的标签之前需要访问该节点,而在此之前需要引用按钮id。
Despite such worries, group messaging looks destined to be old hat by the time next year」s SXSW comes around.