syntax_data: {"ast_node_type":"import","tokens":[{"end":26,"kind":"keyword","start":0,"text":"use"}]}
source_snippet: use rustc_index::IndexVec;
context_before: use rustc_hir::lang_items::LangItem;
context_after: use rustc_middle::mir::visit::{MutatingUseContext, NonMutatingUseContext, PlaceContext, Visitor};