def find_file(filenames)
      return nil if filenames.nil?

      filenames.each_value do |value|
        if value.is_a? Array
          value.each do |file|
            file_path = Utils.lookup_file file
            return file_path unless file_path.nil?
          end
        else
          file_path = Utils.lookup_file value
          return file_path unless file_path.nil?
        end
      end

      nil
    end
def find_file(filenames)
      return nil if filenames.nil?

      filenames.each_value do |value|
        if value.is_a? Array
          value.each do |file|
            file_path = Utils.lookup_file file
            return file_path unless file_path.nil?
          end
        else
          file_path = Utils.lookup_file value
          return file_path unless file_path.nil?
        end
      end

      nil
    end
rubocop:disable Metrics/MethodLength

 Find an existent config file from all posible files.