syntax_data: {"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// regions get eagerly replaced with `ReLateParam` which behaves in the same way as
context_before:     /// late-bound function parameters are instead lowered to a `ReBound`. Late-bound
context_after:     /// `ReEarlyParam`. Region parameters are also sometimes implicit,