syntax_data: {"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"ty::FloatTy::F128"}]}
source_snippet:                 ty::FloatTy::F128 => Some(sym::f128),
context_before:                 ty::FloatTy::F64 => Some(sym::f64),
context_after:             },