syntax_data: {"ast_node_type":"other","tokens":[{"end":39,"kind":"keyword","start":0,"text":"flattened:"}]}
source_snippet:     flattened: &mut Vec<Binding<'tcx>>,
context_before: fn push_sub_branch_bindings<'c, 'tcx: 'c>(
context_after:     candidate_bindings: &'c [SubpatternBindings<'tcx>],