rest-assured/src/main/java/io/restassured/RestAssured.java
public static void proxy(URI uri) {
        if (uri == null) {
            throw new IllegalArgumentException("Proxy URI cannot be null");
        }
        proxy(new ProxySpecification(uri.getHost(), uri.getPort(), uri.getScheme()));
    }
public static void proxy(URI uri) {
        if (uri == null) {
            throw new IllegalArgumentException("Proxy URI cannot be null");
        }
        proxy(new ProxySpecification(uri.getHost(), uri.getPort(), uri.getScheme()));
    }
Instruct REST Assured to connect to a proxy using a URI.

@param uri The URI of the proxy