syntax_data: {"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"(ty::GenericArgKind::Const(a_ct),"}]}
source_snippet:             (ty::GenericArgKind::Const(a_ct), ty::GenericArgKind::Const(b_ct)) => {
context_before:             }
context_after:                 Ok(relation.relate(a_ct, b_ct)?.into())