:sig
DValue DValue::get_by_path(String path, String delim = "/") const

:params
path : delimited child path to traverse
delim : path separator string
return value : resolved child copy, or an empty DValue when traversal fails

:see
0_DValue
2_DValue_has
2_DValue_to_string

:content
Traverses nested map/list children without creating missing nodes. Empty path segments are ignored. If any segment is missing or an intermediate value is not map-shaped, the method returns an empty `DValue`.

```cpp
String label = context.cfg.get_by_path("theme/options/label").to_string("Default");
```