syntax_data: {"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"ty::UintTy::U64"}]}
source_snippet:                 ty::UintTy::U64 => Some(sym::u64),
context_before:                 ty::UintTy::U32 => Some(sym::u32),
context_after:                 ty::UintTy::U128 => Some(sym::u128),