由于我们在这一示例中没有实现任何元数据服务，所以该方法返回一个长度为0的数组(返回null将表明有错误)。

Since we implement no metadata service in this example, the method returns an array with length 0 (returning null would have indicated an error).

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由于它返回一个配置对象数组，因此您总是要检查返回的数组的长度。

Since it returns an array of config objects, you should always check the length of the returned array.

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它生成一个该长度的ASN . 1表示，并返回一个符合ASN . 1长度格式的字节数组。

It authors the ASN.1 representation of the length and returns a byte array that conforms to ASN.1's length format.

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