def METHOD_NAME(self):
    try:
        root = self.prog["drgn_test_radix_tree_multi_order"].address_of_()
    except KeyError:
        # Radix tree multi-order support only exists between Linux kernel
        # commits e61452365372 ("radix_tree: add support for multi-order
        # entries") (in v4.6) and 3a08cd52c37c ("radix tree: Remove
        # multiorder support") (in v4.20), and only if
        # CONFIG_RADIX_TREE_MULTIORDER=y.
        self.skipTest("kernel does not have multi-order radix trees")
    self.assertIdentical(
        radix_tree_lookup(root, 0x80807FFF), NULL(self.prog, "void *")
    )
    for index in range(0x80808000, 0x80808200):
        with self.subTest(index=index):
            self.assertIdentical(
                radix_tree_lookup(root, index), Object(self.prog, "void *", 0x1234)
            )
    self.assertIdentical(
        radix_tree_lookup(root, 0x80808200), NULL(self.prog, "void *")
    )