Consider supporting JEP 445

[josephlewis42]

JEP 445 (Preview in JDK 21) introduces unnamed classes and instance main methods. This could be a boon to writing functions if done right changing our result from this:

package com.example;

import com.google.cloud.functions.HttpFunction;
import com.google.cloud.functions.HttpRequest;
import com.google.cloud.functions.HttpResponse;

public class HelloWorld implements HttpFunction {
 @Override
 public void service(HttpRequest request, HttpResponse response)
 throws Exception {
 response.getWriter().write("Hello, World\n");
 }
}

To something like this:

import com.google.cloud.functions.FuncFramework;

void main() {
 FuncFramework.http((req, res) -> response.getWriter().write("Hello, World\n"));
}