syntax_data: {"ast_node_type":"variable","tokens":[{"end":95,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                             let parent_args = tcx.erase_regions(GenericArgs::identity_for_item(
context_before:                             let typeck_root_def_id = tcx.typeck_root_def_id(did);
context_after:                                 tcx,