{"ast_node_type":"variable","tokens":[{"end":98,"kind":"keyword","start":0,"text":"hir::AssocItemConstraintKind::Equality"}]}
            hir::AssocItemConstraintKind::Equality { .. } if let ty::AssocTag::Fn = assoc_tag => {
        match constraint.kind {
                return Err(self.dcx().emit_err(crate::errors::ReturnTypeNotationEqualityBound {