public String getServiceEndpoint() {
            return serviceEndpoint;
        }
@param serviceEndpoint the service endpoint either with or without the protocol (e.g. https://sns.us-west-1.amazonaws.com or sns.us-west-1.amazonaws.com)
@param signingRegion the region to use for SigV4 signing of requests (e.g. us-west-1)
aws-java-sdk-core/src/main/java/com/amazonaws/client/builder/AwsClientBuilder.java