proc searchForProc(c: PContext; scope: PScope; fn: PSym): tuple[proto: PSym,
    comesFromShadowScope: bool] {....raises: [Exception, OSError, KeyError,
    ValueError, IOError, ERecoverableError], tags: [RootEffect, WriteIOEffect,
    ReadEnvEffect, ReadIOEffect, ReadDirEffect], forbids: [].}