proc liftLocalsIfRequested(prc: PSym; n: PNode; cache: IdentCache;
                           conf: ConfigRef; idgen: IdGenerator): PNode {.
    ...raises: [Exception, ValueError, KeyError, IOError, ERecoverableError], tags: [
    RootEffect, ReadDirEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect],
    forbids: [].}