syntax_data: {"ast_node_type":"other","tokens":[{"end":22,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// region binder.
context_before:     /// Adds the flags/depth from a set of types that appear within the current type, but within a
context_after:     fn bound_computation<T, F>(&mut self, value: ty::Binder<I, T>, f: F)