Как получить список IAM Role, доступных аккаунту через Amazon EC2 API?

public Collection<String> getIAMRolesRange() {
        AmazonIdentityManagementClient identityManagementClient = new AmazonIdentityManagementClient(new BasicAWSCredentials(awsAccount.getAccessKeyId(), awsAccount.getAccessSecret()));
        ListInstanceProfilesResult listInstanceProfilesResult = identityManagementClient.listInstanceProfiles();
        List<String> iamRoles = new LinkedList<String>();
        for(InstanceProfile instanceProfile: listInstanceProfilesResult.getInstanceProfiles()) {
            iamRoles.addAll(Collections2.transform(instanceProfile.getRoles(), iamRoleToStringFunction));
        }

        return iamRoles;
    }