import cn.nukkit.permission.PermissionAttachment; //导入依赖的package包/类
public void removePermissions(Player player){
	PermissionAttachment attachment = player.addAttachment(this.plugin);
	
	TreeMap<String, Boolean> permissions = new TreeMap<String, Boolean>(new PermissionComparator());
	this.plugin.getServer().getPluginManager().getPermissions().forEach((k, v) -> {
		permissions.put(k, false);
	});
	permissions.put("nukkit.command.help", true);
	
	permissions.put("gatekeeper.command.login", true);
	permissions.put("gatekeeper.command.register", true);
	
	attachment.setPermissions(permissions);
	
	this.attachments.put(player, attachment);
}
 

import cn.nukkit.permission.PermissionAttachment; //导入依赖的package包/类
@Override
public PermissionAttachment addAttachment(Plugin plugin) {
    return this.addAttachment(plugin, null);
}
 

import cn.nukkit.permission.PermissionAttachment; //导入依赖的package包/类
@Override
public void removeAttachment(PermissionAttachment attachment) {
    this.perm.removeAttachment(attachment);
}
 

import cn.nukkit.permission.PermissionAttachment; //导入依赖的package包/类
@Override
public PermissionAttachment addAttachment(Plugin plugin) {
    return this.perm.addAttachment(plugin);
}