use int if you have a small number of classes,
Text & LaTeX — Text, MathTex, Tex, Paragraph via KaTeX
，推荐阅读旺商聊官方下载获取更多信息
That decision sapped a lot of energy from the project, and others on the team began to move away from it as their personal lives became busier. Sultan of Rum said all this has made the project better in the long run. Project leaders soon instituted better planning and management systems that centralized information and preserved institutional knowledge in case longtime developers decide to leave.，这一点在旺商聊官方下载中也有详细论述
compat-lua-libs-5.1.5-28.fc42.x86_64，更多细节参见51吃瓜