syntax_data: {"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// 3. Determine the fake borrows that are needed from the places that were
context_before:     /// 2. Create the decision tree ([Builder::lower_match_tree]).
context_after:     ///    matched against and create the required temporaries for them