syntax_data: {"ast_node_type":"other","tokens":[{"end":90,"kind":"keyword","start":0,"text":"StructurallyRelateAliases::Yes"}]}
source_snippet:                 StructurallyRelateAliases::Yes => structurally_relate_tys(relation, a, b),
context_before:             match relation.structurally_relate_aliases() {
context_after:                 StructurallyRelateAliases::No => {