syntax_data: {"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // implementation of `Trait for dyn Trait`, and can be dropped here.
context_before:             // Associated types that require `Self: Sized` do not show up in the built-in
context_after:             .filter(|item| !tcx.generics_require_sized_self(item.def_id))