syntax_data: {"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"Ok(relation.relate(a_lt,"}]}
source_snippet:                 Ok(relation.relate(a_lt, b_lt)?.into())
context_before:             (ty::GenericArgKind::Lifetime(a_lt), ty::GenericArgKind::Lifetime(b_lt)) => {
context_after:             }