from typing import Sequence, Tuple, Any


def flatten_nested_items(
    dictionary: dict, nesting: int = None, include_leaves=None, prefix=None
) -> Sequence[Tuple[Tuple[str, ...], Any]]:
    """
    iterate through dictionary and return with nested keys flattened into a tuple
    """
    next_nesting = None if nesting is None else (nesting - 1)
    prefix = prefix or ()
    for key, value in dictionary.items():
        path = prefix + (key,)
        if isinstance(value, dict) and nesting != 0:
            yield from flatten_nested_items(value, next_nesting, include_leaves, prefix=path)
        elif include_leaves is None or key in include_leaves:
            yield path, value