syntax_data: {"ast_node_type":"other","tokens":[{"end":39,"kind":"keyword","start":0,"text":"match_is_nightly_build(matches)"}]}
source_snippet:         match_is_nightly_build(matches)
context_before:     pub fn is_unstable_enabled(matches: &getopts::Matches) -> bool {
context_after:             && matches.opt_strs("Z").iter().any(|x| *x == "unstable-options")