syntax_data: {"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"AliasTermKind::FreeTy"}]}
source_snippet:             AliasTermKind::FreeTy => "type alias",
context_before:             AliasTermKind::OpaqueTy => "opaque type",
context_after:             AliasTermKind::FreeConst => "unevaluated constant",