syntax_data: {"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// no fully-satisfied candidates, and no or-patterns to expand, so we actually need to
context_before:     /// This is the most subtle part of the match lowering algorithm. At this point, there are
context_after:     /// perform some sort of test to make progress.