syntax_data: {"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"\"disable"}]}
source_snippet:         "disable the 'leak check' for subtyping; unsound, but useful for tests"),
context_before:     no_leak_check: bool = (false, parse_no_value, [UNTRACKED],
context_after:     no_link: bool = (false, parse_no_value, [TRACKED],