syntax_data: {"ast_node_type":"other","tokens":[{"end":14,"kind":"keyword","start":0,"text":"///"}]}
source_snippet: /// of a goal.
context_before: /// corresponds to a `EvalCtxt::probe(_X)` call or the root evaluation
context_after: #[derive_where(PartialEq, Eq, Hash, Debug; I: Interner)]