Reworked `SimulatedClassPool >> #associationAt:ifAbsent:` to throw an error
...if there's no such class variable. This makes it behave more like
dictionary / pool.
@REM -------
@REM make using lcc compiler
@REM type lccmake, and wait...
@REM do not edit - automatically generated from ProjectDefinition
@REM -------
make.exe -N -f bc.mak -DUSELCC=1 %*