Well yes, so would I, but I am having to deal with badly designed legacy
code - my attempts to refactor by 'genericising' can unfortunately only go
so far and there are still large areas where it's frankly easiest to plonk a
large code snippet in when creating a new class for a certain purpose in the
system. Thus far we've had to create by hand... (The classes use an
underlying corresponding set of auto-generated classes which severely limits
the amount of generic code which can be created, and it's far far too risky
to do anything to change that autogenerated code right now, believe me. I
wish I could, but I have to work with what I've got.)

Anyway, found my problem: I had a double $ in the code snippet where there
was a replacement token, which stopped the snippet generation in its tracks.