def title=(v)
      DataTypeValidator.validate "#{self.class}.title", [String, Cell], v
      @title ||= Title.new
      if v.is_a?(String)
        @title.text = v
      elsif v.is_a?(Cell)
        @title.cell = v
      end
    end
def title=(v)
      DataTypeValidator.validate "#{self.class}.title", [String, Cell], v
      @title ||= Title.new
      if v.is_a?(String)
        @title.text = v
      elsif v.is_a?(Cell)
        @title.cell = v
      end
    end
The title object for the chart.
 @param [String, Cell] v
 @return [Title]