89       m_impl.m_mode = Mode::Inlined;  in Update()
122             m_impl.m_mode = Mode::Outsourced;  in Update()
129   bool MightHaveChildren() override { return m_impl.m_mode != Mode::Invalid; }  in MightHaveChildren()
144   enum class Mode { Inlined, Outsourced, Invalid };  enum in NSIndexPathSyntheticFrontEnd
149       case Mode::Inlined:  in GetNumIndexes()
151       case Mode::Outsourced:  in GetNumIndexes()
165       case Mode::Inlined:  in GetIndexAtIndex()
167       case Mode::Outsourced:  in GetIndexAtIndex()
290       m_mode = Mode::Invalid;  in Clear()
295     Impl() : m_mode(Mode::Invalid) {}  in Impl()
297     Mode m_mode;