def add_repetition(pRepetition)
      return nil unless pRepetition.is_a?(Languages::RepetitionData)
      pRepetition.level = @currentLevel
      @basicStructure.push(pRepetition)
    end
def add_repetition(pRepetition)
      return nil unless pRepetition.is_a?(Languages::RepetitionData)
      pRepetition.level = @currentLevel
      @basicStructure.push(pRepetition)
    end
Add repetition to basicStructure
 @param pRepetition RepetitionData to add inside basicStrure