Method groupByServerId

ZezeJava/ZezeJava/src/main/java/Zeze/Game/Online.java:1601–1623

(@NotNull Iterable<Long> roleIds)

	}

	public @NotNull IntHashMap<RoleOnServer> groupByServerId(@NotNull Iterable<Long> roleIds) {
		var groups = new IntHashMap<RoleOnServer>();
		var groupNotOnline = new RoleOnServer(); // LinkName is Empty And Socket is null.
		groups.put(-1, groupNotOnline);

		for (var roleId : roleIds) {
			var online = getLoginOnline(roleId);
			if (online == null) {
				groupNotOnline.roles.add(roleId);
				continue;
			}

			// 后面保存connector.Socket并使用，如果之后连接被关闭，以后发送协议失败。
			var group = groups.get(online.getServerId());
			if (group == null) {
				group = new RoleOnServer();
				group.serverId = online.getServerId();
				groups.put(group.serverId, group);
			}
			group.roles.add(roleId);
		}
		return groups;
	}

	private static @NotNull RoleOnServer merge(@Nullable RoleOnServer current, @NotNull RoleOnServer m) {
		if (current == null)