syntax_data: {"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"\"assert"}]}
source_snippet:         "assert that the incremental cache is in given state: \
context_before:     assert_incr_state: Option<String> = (None, parse_opt_string, [UNTRACKED],
context_after:          either `loaded` or `not-loaded`."),