def METHOD_NAME():
    # it should not extract empty keys
    span = Span("test")
    context = {
        "correlation_id": None,
        "exchange": "",
        "timelimit": (None, None),
        "retries": 0,
    }
    tags = span.get_tags()
    set_tags_from_context(span, context)
    assert {} == tags
    # edge case: `timelimit` can also be a list of None values
    context = {
        "timelimit": [None, None],
    }
    set_tags_from_context(span, context)
    assert {} == tags