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