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MemberDecorator < ApplicationDecorator
  def friends
    t(".friends_gender") # key scope: 'member.friends_gender'
  end
end

class ApplicationDecorator < Draper::Decorator
  delegate_all

  private

  def translate(*args)
    key = args.first
    if key.is_a?(String) && (key[0] == '.')
      underscored_scope = self.class.name.gsub('Decorator', '').underscore
      args[0] = underscored_scope + key
    end

    I18n.translate(*args)
  end
  alias :t :translate

  def localize(*args)
    I18n.localize(*args)
  end
  alias :l :localize
end