syntax_data: {"ast_node_type":"variable","tokens":[{"end":90,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let witness_1_is_privately_uninhabited = if let Some(witness_1) = witnesses.get(0)
context_before:         // if we disregard visibility.
context_after:             && let ty::Adt(adt, args) = witness_1.ty().kind()