Descendent data — a list of immediate descendents and their details.
子调用数据——一列直接子调用及其详情。
In Ruby 1.9, SimpleObject becomes the very top of the object hierarchy, with object as its immediate descendent.
在Ruby 1.9中，SimpleObject成为对象层级的顶端，Object作为它的直接后代。
In Ruby 1.9, SimpleObject becomes the very top of the object hierarchy, with object as its immediate descendent.
在Ruby 1.9中，SimpleObject成为对象层级的顶端，Object作为它的直接后代。
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