@Override
    public java.util.concurrent.Future<ListRolesResult> listRolesAsync(com.amazonaws.handlers.AsyncHandler<ListRolesRequest, ListRolesResult> asyncHandler) {

        return listRolesAsync(new ListRolesRequest(), asyncHandler);
    }
Simplified method form for invoking the ListRoles operation with an AsyncHandler.

@see #listRolesAsync(ListRolesRequest, com.amazonaws.handlers.AsyncHandler)
aws-java-sdk-iam/src/main/java/com/amazonaws/services/identitymanagement/AmazonIdentityManagementAsyncClient.java