syntax_data: {"ast_node_type":"other","tokens":[{"end":35,"kind":"keyword","start":0,"text":"ty::FnDef(_,"}]}
source_snippet:             ty::FnDef(_, args) => {
context_before:         match ty.kind() {
context_after:                 // HACK(eddyb) ignore lifetimes found shallowly in `args`.