[go-server]How to separate the go-server business code from generated stubs code?

[dereking]

Hi, guys, I used this shell to generate go-server stub code.
java -jar ./swagger-codegen-cli-3.0.36.jar generate \ -i ../swagger/data/api.swagger.yaml \ -l go-server \ -o ../dist/go_svr

I found that the generated api_file.go code looks like this:
`
func FilesLs(w http.ResponseWriter, r *http.Request) {

w.Header().Set("Content-Type", "application/json; charset=UTF-8")

w.WriteHeader(http.StatusOK)

}
`
I thought I must write my business code in those generated *.go files. Once I change the source "api.swagger.yaml" file, I regenerated the api_file.go, and I lost all code I wrote. Is there any mistake I made?

Or, how can I separate the go-server business code from generated stubs code?