it werks

test/TestBackend.ts

@@ -1,6 +1,6 @@
-import { Server } from '../src/Backend'
+import { RPCServer } from '../src/Backend'
 
-new Server(20000, [{
+new RPCServer(20000, [{
     name: "HelloWorldRPCGroup",
     publicRPCs: () => [],
     localRPCs: () => [{

test/TestFrontend.ts

@@ -1,7 +1,7 @@
-import { Client } from '../src/Frontend'
+import { RPCSocket } from '../src/Frontend'
 
-const client = new Client(20000, 'localhost')
-client.connect().then(_ => {
-    client.info().then(console.log)
-    client["HelloWorldRPCGroup"].echo("x").then(console.log)
+const socket = new RPCSocket(20000, 'localhost')
+socket.connect().then(_ => {
+    socket.info().then(console.log)
+    socket["HelloWorldRPCGroup"].echo("x").then(console.log)
 })