syntax_data: {"ast_node_type":"variable","tokens":[{"end":67,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let user_provided_types = typeck_results.user_provided_types();
context_before: ) -> Option<CanonicalUserType<'tcx>> {
context_after:     let mut user_ty = *user_provided_types.get(hir_id)?;