问题:我在另一个结构中有一个结构映射，我想初始化结构的嵌套映射，但显然这是不可能的。代码:typeExporterstruct{TopicsByNamemap[string]Topic}typeTopicstruct{NamestringPartitionsmap[int32]Partition}typePartitionstruct{PartitionIDint32HighWaterMarkint64}//EventuallyIwanttodosomethinglike:e:=Exporter{TopicsByName:make(map[string]Topic)}for_,topi
