class Comet::OSInfo

def to_hash
  ret = {}
  unless @version.nil?
    ret['version'] = @version
  end
  unless @distribution.nil?
    ret['distribution'] = @distribution
  end
  unless @build.nil?
    ret['build'] = @build
  end
  unless @os.nil?
    ret['os'] = @os
  end
  unless @arch.nil?
    ret['arch'] = @arch
  end
  @unknown_json_fields.each do |k, v|
    ret[k] = v
  end
  ret
end