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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def may_be_null_is_nullable():
 """If may_be_null returns nullable or if NULL can be passed in. This can still be wrong if the specific typelib is older than the linked libgirepository. https://bugzilla.gnome.org/show_bug.cgi?id=660879#c47 """


    repo = GIRepository()
    repo.require("GLib", "2.0", 0)
    info = repo.find_by_name("GLib", "spawn_sync")
    # this argument is (allow-none) and can never be (nullable)
    return not info.get_arg(8).may_be_null