You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: get_login_urlbuilder.go
    path of file: ./repos/go-swagger/examples/oauth2/restapi/operations
    
    the code of the file until where you have to start completion: // Code generated by go-swagger; DO NOT EDIT.

package operations

// This file was generated by the swagger 
    
func (o *GetLoginURL) Must(u *url.URL, err error) *url.URL {
	if err != nil {
		panic(err)
	}
	if u == nil {
		panic("url can't be nil")
	}
	return u
}