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