syntax_data: {"ast_node_type":"other","tokens":[{"end":45,"kind":"keyword","start":0,"text":"ty::Binder::dummy(ty::FnSig"}]}
source_snippet:                 ty::Binder::dummy(ty::FnSig {
context_before:                 // ignore errors (#54954)
context_after:                     inputs_and_output: Default::default(),