syntax_data: {"ast_node_type":"import","tokens":[{"end":19,"kind":"keyword","start":0,"text":"use"}]}
source_snippet: use rustc_macros::{
context_before: #[cfg(feature = "nightly")]
context_after:     Decodable, Decodable_NoContext, Encodable, Encodable_NoContext, HashStable_NoContext,