syntax_data: {"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"UnstableFeatures::from_environment(krate).is_nightly_build()"}]}
source_snippet:         UnstableFeatures::from_environment(krate).is_nightly_build()
context_before:     fn is_nightly_build(krate: Option<&str>) -> bool {
context_after:     }