class ConfiguredSystemDecorator < MiqDecorator
  def self.fonticon
    'ff ff-configured-system'
  end
end

class ConfiguredSystemDecorator < MiqDecorator
  def self.fonticon
    'ff ff-configured-system'
  end

  def single_quad
    {
      :fonticon => fonticon
    }
  end
end

Add missing single_quad definition for ConfiguredSystemDecorator
Add missing single_quad definition for ConfiguredSystemDecorator
