proc commonOptimizations(g: ModuleGraph; idgen: IdGenerator; c: PSym; n: PNode): PNode {....raises: [
    KeyError, Exception, ValueError, OSError, IOError, ERecoverableError], tags: [
    ReadDirEffect, RootEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect,
    TimeEffect].}

proc transformBody(g: ModuleGraph; idgen: IdGenerator; prc: PSym; cache: bool): PNode {....raises: [
    KeyError, Exception, ValueError, OSError, IOError, ERecoverableError], tags: [
    ReadDirEffect, RootEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect,
    TimeEffect].}

proc transformExpr(g: ModuleGraph; idgen: IdGenerator; module: PSym; n: PNode): PNode {....raises: [
    Exception, ValueError, KeyError, OSError, IOError, ERecoverableError], tags: [
    RootEffect, ReadDirEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect,
    TimeEffect].}

proc transformStmt(g: ModuleGraph; idgen: IdGenerator; module: PSym; n: PNode): PNode {....raises: [
    Exception, ValueError, KeyError, OSError, IOError, ERecoverableError], tags: [
    RootEffect, ReadDirEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect,
    TimeEffect].}