syntax_data: {"ast_node_type":"other","tokens":[{"end":19,"kind":"keyword","start":0,"text":"Hir(PpHirMode),"}]}
source_snippet:     Hir(PpHirMode),
context_before:     /// Options that print the HIR, i.e. `-Zunpretty=hir`
context_after:     /// `-Zunpretty=hir-tree`