syntax_data: {"ast_node_type":"variable","tokens":[{"end":67,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // Droppiness does not depend on regions, so let us erase them.
context_before: ) -> SmallVec<[Ty<'tcx>; 4]> {
context_after:     let ty = tcx.try_normalize_erasing_regions(typing_env, ty).unwrap_or(ty);