syntax_data: {"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"///"}]}
source_snippet: /// generics of `target_impl`, including both those needed to unify with
context_before: /// `source_trait_ref`. If successful, returns the generic parameters for *all* the
context_after: /// `source_trait_ref` and those whose identity is determined via a where