# File lib/compass/configuration/helpers.rb, line 30
      def configuration_for(config, filename = nil)
        if config.is_a?(Compass::Configuration::Data)
          config
        elsif config.respond_to?(:read)
          filename ||= config.to_s if config.is_a?(Pathname)
          Compass::Configuration::Data.new_from_string(config.read, filename)
        elsif config.is_a?(Hash)
          Compass::Configuration::Data.new(filename, config)
        elsif config.is_a?(String)
          Compass::Configuration::Data.new_from_file(config)
        elsif config.is_a?(Symbol)
          Compass::AppIntegration.lookup(config).configuration
        else
          raise "I don't know what to do with: #{config.inspect}"
        end
      end