public Builder servicePath(String s3ProxyServicePath) {
            String path = Strings.nullToEmpty(s3ProxyServicePath);

            if (!path.isEmpty()) {
                if (!path.startsWith("/")) {
                    path = "/" + path;
                }
            }

            this.servicePath = path;

            return this;
        }
S3Proxy translates S3 HTTP operations into jclouds provider-agnostic
operations.  This allows applications using the S3 API to interface with any
provider that jclouds supports, e.g., EMC Atmos, Microsoft Azure,
OpenStack Swift.
src/main/java/org/gaul/s3proxy/S3Proxy.java