syntax_data: {"ast_node_type":"other","tokens":[{"end":45,"kind":"keyword","start":0,"text":"\"hir,typed\""}]}
source_snippet:         "hir,typed" => Hir(PpHirMode::Typed),
context_before:         "hir,identified" => Hir(PpHirMode::Identified),
context_after:         "hir-tree" => HirTree,