【已完成】52-TopicBar Overview
C1TopicBar represents a topic bar. In C1OutBar the control provides a collection of single pages organized into one group whereas C1TopicBar contains a collection of pages organized into various groups. The collection of pages in C1TopicBar are of the type, C1TopicPage. Each page includes a title bar with a collapsible/expandable image and the content area consists of links. Each page/group can have one or more links. Clicking once on the group collapses the link items in the selected group and clicking again expands the link items in the selected group. Each topic page is organized in a vertical stack.详情请参见文档：
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