}

        public static AccessorKey ofOldMethod(JApiMethod jApiMethod) {
            String name = jApiMethod.getName();
            String descriptor = jApiMethod.getOldMethod().get().getSignature();
            String containingType = jApiMethod.getjApiClass().getFullyQualifiedName();
            return new AccessorKey(containingType, name, descriptor);
        }

        @Override

        if (!(jApiCompatibility instanceof JApiMethod) || ((JApiMethod) jApiCompatibility).getOldMethod().isEmpty()) {
            return Optional.empty();
        }
        JApiMethod jApiMethod = (JApiMethod) jApiCompatibility;