syntax_data: {"ast_node_type":"function","tokens":[{"end":31,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn gather_args(&mut self) {
context_before: impl<'a, 'tcx, F: Fn(Ty<'tcx>) -> bool> MoveDataBuilder<'a, 'tcx, F> {
context_after:         for arg in self.body.args_iter() {