syntax_data: {"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// A call to `probe` while proving the current goal. This is
context_before:     AddGoal(GoalSource, CanonicalState<I, Goal<I, I::Predicate>>),
context_after:     /// used whenever there are multiple candidates to prove the