*
* @param rpcErrors the list of RpcErrors
*/
- public RpcResultBuilder<T> withRpcErrors(final Collection<RpcError> rpcErrors) {
+ public RpcResultBuilder<T> withRpcErrors(final Collection<? extends RpcError> rpcErrors) {
if (rpcErrors != null) {
for (RpcError error : rpcErrors) {
addError(error);