syntax_data: {"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"hir::IsAsync::Async(_)"}]}
source_snippet:         hir::IsAsync::Async(_) => ty::Asyncness::Yes,
context_before:     node.fn_sig().map_or(ty::Asyncness::No, |sig| match sig.header.asyncness {
context_after:         hir::IsAsync::NotAsync => ty::Asyncness::No,