public final class Map
extends com.google.flatbuffers.Table
A Map is a logical nested type that is represented as
List>
In this layout, the keys and values are each respectively contiguous. We do
not constrain the key and value types, so the application is responsible
for ensuring that the keys are hashable and unique. Whether the keys are sorted
may be set in the metadata for this field.
In a field with Map type, the field has a child Struct field, which then
has two children: key type and the second the value type. The names of the
child fields may be respectively "entries", "key", and "value", but this is
not enforced.
Map
```text
- child[0] entries: Struct
- child[0] key: K
- child[1] value: V
```
Neither the "entries" field nor the "key" field may be nullable.
The metadata is structured so that Arrow systems without special handling
for Map can make Map an alias for List. The "layout" attribute for the Map
field must have the same contents as a List.