proc collectVTableDispatchers(g: ModuleGraph) {....raises: [Exception, KeyError,
    ValueError, OSError, IOError, ERecoverableError], tags: [RootEffect,
    ReadDirEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect], forbids: [].}

proc sortVTableDispatchers(g: ModuleGraph) {....raises: [Exception, KeyError],
    tags: [RootEffect], forbids: [].}