@Override
    protected AWSsigner build(AwsSyncClientParams params) {
        return new AWSsignerClient(params);
    }
Construct a synchronous implementation of AWSsigner using the current builder configuration.

@param params
       Current builder configuration represented as a parameter object.
@return Fully configured implementation of AWSsigner.
aws-java-sdk-signer/src/main/java/com/amazonaws/services/signer/AWSsignerClientBuilder.java