support for multiple routing response docs

example/user.api

@@ -36,6 +36,11 @@ type (
     UserSearchReq {
         KeyWord string `form:"keyWord"` // 关键词
     }
+
+    ErrorResponse {
+        Code string `json:"code"`
+        Message string `json:"message"`
+    }
 )
 
 @server(
@@ -59,6 +64,13 @@ service user-api {
         summary: 获取用户信息
     )
     @handler getUserInfo
+    /*
+    @respdoc-400 (
+        100101: out of authority
+        100102: user not exist
+    ) // Error code list
+    */
+    /*    @respdoc-500 (ErrorResponse) // Server Error */
     get /user/:id (UserInfoReq) returns (UserInfoReply)
 
     @doc(

example/user.json

@@ -103,6 +103,18 @@
             "schema": {
               "$ref": "#/definitions/UserInfoReply"
             }
+          },
+          "400": {
+            "description": "Error code list",
+            "schema": {
+              "example": "{\"100101\":\"out of authority\",\"100102\":\"user not exist\"}"
+            }
+          },
+          "500": {
+            "description": "Server Error",
+            "schema": {
+              "$ref": "#/definitions/ErrorResponse"
+            }
           }
         },
         "parameters": [
@@ -120,6 +132,22 @@
     }
   },
   "definitions": {
+    "ErrorResponse": {
+      "type": "object",
+      "properties": {
+        "code": {
+          "type": "string"
+        },
+        "message": {
+          "type": "string"
+        }
+      },
+      "title": "ErrorResponse",
+      "required": [
+        "code",
+        "message"
+      ]
+    },
     "LoginReq": {
       "type": "object",
       "properties": {