syntax_data: {"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// outer match pair that tests for the variant `Some`, and then a subpair
context_before:     /// parent has succeeded. For example, the pattern `Some(3)` might have an
context_after:     /// that tests its field for the value `3`.