syntax_data: {"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// in `bind`. This may be (debug) asserted in the future.
context_before:     /// because bound vars aren't allowed to change here, whereas they are
context_after:     pub fn rebind<U>(&self, value: U) -> Binder<I, U>