syntax_data: {"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"typing_env:"}]}
source_snippet:             typing_env: ty::TypingEnv::non_body_analysis(tcx, def),
context_before:             // mode which reveals the opaque types defined by that body.
context_after:             region_scope_tree: tcx.region_scope_tree(def),