def lock_content(content)
      content = content.to_smash
      content.merge!(:sfn_lock_enabled => true)
      safe = SfnParameters::Safe.build(
        config.fetch(:sfn_parameters, :safe, Smash.new)
      )
      safe.lock(dump_json(content))
    end
def lock_content(content)
      content = content.to_smash
      content.merge!(:sfn_lock_enabled => true)
      safe = SfnParameters::Safe.build(
        config.fetch(:sfn_parameters, :safe, Smash.new)
      )
      safe.lock(dump_json(content))
    end
Lock the given content

 @param content [Hash] content to lock
 @return [Hash] locked content