Method TryGetMapData

tutorials/common/imgui/imgui_internal.h:675–675

It is the map we need iterate to find valid items, since we don't have "alive" storage anywhere

    int         GetBufSize() const                  { return Buf.Size; }
    int         GetMapSize() const                  { return Map.Data.Size; }   // It is the map we need iterate to find valid items, since we don't have "alive" storage anywhere
    T*          TryGetMapData(ImPoolIdx n)          { int idx = Map.Data[n].val_i; if (idx == -1) return NULL; return GetByIndex(idx); }
#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
    int         GetSize()                           { return GetMapSize(); } // For ImPlot: should use GetMapSize() from (IMGUI_VERSION_NUM >= 18304)
#endif