syntax_data: {"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"assert_incr_state:"}]}
source_snippet:     assert_incr_state: Option<String> = (None, parse_opt_string, [UNTRACKED],
context_before:         "encode MIR of all functions into the crate metadata (default: no)"),
context_after:         "assert that the incremental cache is in given state: \