syntax_data: {"ast_node_type":"import","tokens":[{"end":24,"kind":"keyword","start":0,"text":"use"}]}
source_snippet: use rustc_hir::def_id::{
context_before: use rustc_data_structures::sync::{self, AppendOnlyIndexVec, FreezeLock};
context_after:     CrateNum, DefId, LOCAL_CRATE, LocalDefId, StableCrateId, StableCrateIdMap,