| id | 层级视图项标识符。 |
int Returns merged samples count represented by the tree item.
返回层级视图项所表示的合并样本数量。
当 HierarchyFrameDataView 使用 ViewMode.MergeSamplesWithTheSameName 模式时，在相同层级视图级别上具有相同名称的多个样本会合并在一起，并表示为一项。
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