syntax_data: {"ast_node_type":"other","tokens":[{"end":36,"kind":"keyword","start":0,"text":"self.it.next().map(|value|"}]}
source_snippet:         self.it.next().map(|value| {
context_before:     fn next(&mut self) -> Option<Self::Item> {
context_after:             EarlyBinder { value: *value, _tcx: PhantomData }.instantiate(self.cx, self.args)