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