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First iteration on integrating functions with the backend.
We still don't update the list of available functions automatically. However the improved FunctionComponent now fetches the function spec on demand. It displays a loading state while the spec is loaded.
I put a bunch of todo items to give you some pointers for where to iterate next.
You may want to study the lifecycle section of FunctionComponent as that's the general pattern to 'synchronize' async data for a synchronous rendering. The component is modelled as a state machine describing transitions. In our case it's just loading (func is null) or loaded (func is set).