from typing import Collection
from typing import Optional


def max_offset(offsets: "Collection[Optional[str]]") -> "Optional[str]":
    """
    Return the most "recent" offset from a collection of offsets.

    :param offsets: A collection of offsets to examine.
    :return: The largest offset, or ``None`` if unknown.
    """
    non_none_offsets = [offset for offset in offsets if offset is not None]
    return max(non_none_offsets) if non_none_offsets else None