syntax_data: {"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// 1. For each constituent type `Y` in `X`, `Y : Foo` holds
context_before:     ///
context_after:     /// 2. For each where-clause `C` declared on `Foo`, `[Self => X] C` holds.