tmcat
tmcat is a solution to the current lack of multi-file external modules in TypeScript.
Currently, TypeScript allows for multi-file internal modules, which are useful for code organization. However, multi-file external modules (which we'll refer to as MFEMs) are not yet possible. tmcat solves this problem by concatenating source files to emulate MFEM support. The complication with doing this is translating line numbers in error messages from the TypeScript compiler: tmcat does this for you.
TODO: write example