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"Now, we should define an increment action." <TYPING INTENSIFIES>. 40 lines of code later, we can increment a variable.

This project is written as a literate program and most important parts of the code are exposed. What you see there is how it's actually implemented.

The action is defined like this:

const IncrementCounter = createAction(domain, 'IncrementCounter',t.maybe(incrementParameter))

(A oneliner)

to address this confusion, I've added an "excerpt from the library" label to show which parts of the code are just parts of the actual stack.