@Deprecated
    public Optional<String> getAbbreviation() {
        return Optional.empty();
    }
Returns the endpoint prefix for the service.

This value is not unique across services and it can change at any time.
Therefore it MUST NOT be used to generate class names, namespaces, or
for any other purpose that requires a static, unique identifier. The
sdkId property should be used for those purposes.

@return Returns the aws sdk endpoint prefix.
smithy-aws-traits/src/main/java/software/amazon/smithy/aws/traits/ServiceTrait.java