[Split]Index{32,64}
with the corresponding column type for the offset column of the collection parent field.
All child fields use the default column types for std::string (Index64 for the principal column, Char for the second column) and std::int32_t (Int32).
- Single-element maps, with ascending values for both key and value
- Empty maps
- Increasing number of elements in the map: one key-value pair in the first field, two key-value pairs in the second field, etc.
The values can be found in the reference file types.map.fundamental.json.