require(HttpMethod.permitsRequestBody(method)) {
        "method $method must not have a request body."
      }
    }
    this.method = method
    this.body = body
  }

fun <T : Any> Request.Builder.commonTag(
  type: KClass<T>,
  tag: T?,
) = apply {
  if (tag == null) {
    if (tags.isNotEmpty()) {
      (tags as MutableMap).remove(type)
    }
  } else {
    val mutableTags: MutableMap<KClass<*>, Any> =

#
# Specification:
# map:{
#     ; serviceName = [your service name]
#     ; domainPackage = [package]
#     ; environmentList = list:{ [environment name] }
#     ; isMakeActionHtml = [true or false]
#     ; commonMap = map:{
#         ; path = [relative path to common project from DBFlute client]
#         ; freeGenList = list:{ [env or config or label or message or html] }