API does not have a return value. but API spec has

Generated API does not return the HTTP response code.

As shown below, the API specification has responses 200 and 400; however, when the addTeam() API is generated, it is generated with the return type 'void'.

I want to handle the response code 200 and/or 400. Does it mean I have explicitly, define the payload type in the response specification? Can someone please provide more details on how my 'responses' specification should be?

swagger-codegen-3.0.0

Swagger declaration file content or url

 49   /switches:
 50     post:                                                                                           
 51       summary: Add team                                                                           
 52       operationId: addTeam                                                                        
 53       requestBody:                                                                                  
 54         description: Team detail being added                                                      
 55         content:                                                                                    
 56           application/json:                                                                         
 57             schema:                                                                                 
 58               type: array                                                                           
 59               items:                                                                                
 60                 $ref: "#/components/schemas/addTeamPayload"                                                                           
 61       responses:                                                                                    
 62         200:                                                                                        
 63           description: Ok                                                                           
 64         400:                                                                                        
 65           description: Bad request                                                                  
 66       tags:                                                                                         
 67         - Team

Command line used for generation

java -jar swagger-codegen-cli-3.0.0-20180710.190537-87.jar generate -i teamApiSpec.yaml -l java --additional-properties jackson=true --artifact-id swagger-java-client-api

Generated Java code:

/**
 * Add team
 * 
 * @param body Team detail being added (optional)
 * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
    
 */
public void addTeam(List<AddTeamPayload> body) throws ApiException {
    addTeamWithHttpInfo(body);
}

/**
 * Add Team
 * 
 * @param body Team detail being added (optional)
 * @return ApiResponse&lt;Void&gt;
 * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
    
 */
public ApiResponse<Void> addTeamWithHttpInfo(List<AddTeamPayload> body) throws ApiException {
    com.squareup.okhttp.Call call = addTeamValidateBeforeCall(body, null, null);
    return apiClient.execute(call);
}

Reproduce the generation using teamApiSpec.yaml, swagger-codegen-3.0.0, the Java language option, and the shown command. Then trace the Java generator templates or response-handling entry point to understand why the declared 200 and 400 responses produce ApiResponse; done means the generated API exposes the response information described by the specification.