docs: public ACL getACL(AuthScheme scheme, String id){
          ProtocolHeader header = new ProtocolHeader();
          header.setType(ProtocolType.GetACL);
  
          GetACLProtocol p = new GetACLProtocol(scheme, id);
  
          Response resp = connection.submitRequest(header, p, null);
          return ((GetACLResponse) resp).getAcl();
      }