Data type of defined numbers?

Question

typescript

Hello, webpack has a
webpack.Compilation object with fields in the form

Compilation.PROCESS_ASSETS_STAGE_ADDITIONAL = -2000;
Compilation.PROCESS_ASSETS_STAGE_PRE_PROCESS = -1000;
Compilation.PROCESS_ASSETS_STAGE_OPTIMIZE_SIZE = 400;

I want to create a data type that is number but which allows you to enter a number only that which is the value of one of the Compilation fields, how to implement this in index.d.ts