syntax_data: {"ast_node_type":"other","tokens":[{"end":34,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // Assert there is a Self.
context_before:     pub fn erase_self_ty(interner: I, projection_predicate: ProjectionPredicate<I>) -> Self {
context_after:         projection_predicate.projection_term.args.type_at(0);