decodeAcls = decoder => ({
  principal: decoder.readString(),
  host: decoder.readString(),
  operation: decoder.readInt8(),
  permissionType: decoder.readInt8(),
})
DescribeAcls Response (Version: 0) => throttle_time_ms error_code error_message [resources]
  throttle_time_ms => INT32
  error_code => INT16
  error_message => NULLABLE_STRING
  resources => resource_type resource_name [acls]
    resource_type => INT8
    resource_name => STRING
    acls => principal host operation permission_type
      principal => STRING
      host => STRING
      operation => INT8
      permission_type => INT8