little tool for building Wardley maps

bail early on errors

Returning errors can feel warm and fuzzy, but it does no good if the caller doesn't actually check the return value.

Scenario: define a new function B call it when initializing global variable A everything works fine restart

Before this commit you get a weird error because we silently stopped loading, and now lots of functions are missing.

After this commit you get a better error message.

Created by  Kartik K. Agaram  on June 19, 2023
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