You can simplify Listing 22 by looking at each element as in Listing 23.
通过按清单23所示来查看每个元素，您可以简化清单22。
A new option enables element filters that hide elements except the ones specified in the filter, as shown in Figure 22.
有一个新选项支持元素筛选器，可以隐藏筛选器中除指定元素以外的元素，如图22所示。
Listing 22 is a modified version of code originally provided by Sam Ruby that takes the JSON serialization of an Atom text construct or content element and converts it back into a string.
清单22对最初由Sam Ruby提供的代码进行了修改，包含Atom文本结构或内容元素的JSON序列化，并将其转换为一个字符串。
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