For those methods to accept no argument would require a null where point was specified.
对于不接受参数的方法，在指定point的地方需要一个null。
There is no point in setting the fields to null and do similar silly things.
是毫无意义的字段设置为空时，做类似的蠢事。
There is no point in setting the fields to null and do similar silly things.
是毫无意义的字段设置为空时，做类似的蠢事。
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