def title
      class_name = Helper.color(Helper.class_name(self), sev: :bin)
      size_str = index.nil? ? nil : "[#{Helper.color(format('%#x', idx_to_size))}]"
      "#{class_name}#{size_str}: "
    end
def title
      class_name = Helper.color(Helper.class_name(self), sev: :bin)
      size_str = index.nil? ? nil : "[#{Helper.color(format('%#x', idx_to_size))}]"
      "#{class_name}#{size_str}: "
    end
For pretty inspect.
 @return [String] Title with color codes.