syntax_data: {"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"///"}]}
source_snippet: /// Here the first arm gives the first `MatchTreeBranch`, which has two sub-branches, one for each
context_before: /// ```
context_after: /// alternative of the or-pattern. They are kept separate because each needs to bind `x` to a