JohnnyJayJay

import java.util.concurrent.TimeUnit;
import java.util.Map;
import java.util.HashMap;
import java.util.function.Function;

public class RateLimiter<T> {
  
  private final long rateLimit;
  private final Function<T, ?> keyMapper;
  private final Map<?, Long> timestamps;

JohnnyJayJay

package com.github.johnnyjayjay.testplugin;

import org.bukkit.Bukkit;
import org.bukkit.event.Event;
import org.bukkit.event.EventPriority;
import org.bukkit.event.HandlerList;
import org.bukkit.event.Listener;
import org.bukkit.plugin.Plugin;

import java.util.function.Consumer;