public HostPrefixProcessor getHostPrefixProcessor() {
        return endpointTrait != null ? new HostPrefixProcessor(endpointTrait.getHostPrefix()) : null;
    }
Return the {@link HostPrefixProcessor} class that has data to be used for modifying the endpoint host.
aws-java-sdk-code-generator/src/main/java/com/amazonaws/codegen/model/intermediate/OperationModel.java