def METHOD_NAME(change_dict: Dict[str, Any], orig_dict: MutableMapping[str, Any]):
    """
    Merge changes into the original dictionary. Leaf values in the change dict
    overwrite the values in the original dictionary.
    """
    for k, v in change_dict.items():
        if not orig_dict.get(k):
            orig_dict[k] = v
        else:
            if isinstance(orig_dict[k], dict) and isinstance(v, dict):
                METHOD_NAME(v, orig_dict[k])
            else:
                orig_dict[k] = v