syntax_data: {"ast_node_type":"variable","tokens":[{"end":28,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let mut map = Self {
context_before:     pub fn new(tcx: TyCtxt<'tcx>, body: &Body<'tcx>, value_limit: Option<usize>) -> Self {
context_after:             locals: IndexVec::from_elem(None, &body.local_decls),