syntax_data: {"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// If `binder` is `ty::INNERMOST`, this indicates whether
context_before:     /// bound by `binder` or bound by some binder outside of `binder`.
context_after:     /// there are any late-bound regions that appear free.