throw logger.nullArgumentError("At least one endpoint URI must be provided");
// create an STSClient for each endpointURI.
this.clients = new STSClient[endpointURIs.length];
Builder builder = new STSClientConfig.Builder();
builder.serviceName(serviceName).portName(port).username(secInfo.username).password(secInfo.passwd);
int index = 0;
for (String endpointURI : endpointURIs) {
builder.endpointAddress(endpointURI);
this.clients[index++] = STSClientFactory.getInstance().create(builder.build());