```sh
result = map_clear handle
```
Clears the provided map.
The map handle.
True if successful.
```sh
handle = map
result = map_put ${handle} a 1
result = map_is_empty ${handle}
assert_false ${result}
result map_clear ${handle}
assert ${result}
result = map_is_empty ${handle}
assert ${result}
release ${handle}
```