Custom Types and Formats
============================
Version 2.0 of `FCPGtools` utilizes `custom_types.py` to enable specific 
function input/output type-hints, encode Flow Direction Raster (FDR) formats, 
and define the `TauDEM` terrain engine's command line arguments.

.. literalinclude:: ../../src/fcpgtools/custom_types.py
   :language: python