syntax_data: {"ast_node_type":"other","tokens":[{"end":30,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// for the given pattern.
context_before:     /// Creates a `FlatPat` containing a simplified [`MatchPairTree`] list/forest
context_after:     fn new(place: PlaceBuilder<'tcx>, pattern: &Pat<'tcx>, cx: &mut Builder<'_, 'tcx>) -> Self {