# File lib/hiera/config.rb, line 57
    def validate!
      case @config[:merge_behavior]
      when :deep,'deep',:deeper,'deeper'
        begin
          require "deep_merge"
          require "deep_merge/rails_compat"
        rescue LoadError
          raise Hiera::Error, "Must have 'deep_merge' gem installed for the configured merge_behavior."
        end
      end
    end