{"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"RegionNameSource::AnonRegionFromArgument(ref"}]}
            RegionNameSource::AnonRegionFromArgument(ref highlight)
            | RegionNameSource::AnonRegionFromImplSignature(span, _) => Some(span),
            | RegionNameSource::AnonRegionFromOutput(ref highlight, _) => match *highlight {