syntax_data: {"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// inside of a function, we convert these bound variables to placeholder
context_before:     /// Late-bound function parameters are represented using a `ReBound`. When
context_after:     /// parameters via `tcx.liberate_late_bound_regions`. They are then treated