:sig
DTree

:desc
Dynamic tree/container type used throughout UCE for structured data.

`DTree` can hold a `String`, `f64`, `bool`, pointer, or a nested map of child `DTree` values.

Use `t["key"]` to access or create child entries. Use `push()` / `pop()` when treating it like an array-like container with numeric string keys.

Common uses include:
- `json_decode()` / `json_encode()`
- `context.var`
- `context.call`
- `unit_call()` return values

Useful methods include:
- `to_string()`
- `to_json()`
- `get_type_name()`
- `get_by_path()`
- `set_bool()`
- `remove()`
- `clear()`
- `each()`

:related
**PHP:** Nested associative arrays, `stdClass`, decoded JSON trees, and helper accessors for deep array paths.
**JavaScript / Node.js:** Plain objects, arrays, `Map`, and JSON-shaped data passed between handlers.

:see
>types