Wonka, in essence, can be used to create sources, to transform sources with operators, and to consume values from a source with sinks.
Looking at the type definition for what a sink is, it’s just a function that can be
called with a signal, which is either Start, Push, or End.
Building on that, a source is just a function
that takes a sink and calls it with signals over time. And lastly an operator is
a function that accepts a source, alongside some options most of the time, and returns
a new source.
Wonka comes with plenty of sources, operators, and sinks built in. This section describes these and explains what they can be used for.