code: func AccessCodeFlow(authorizationURL, tokenURL string) {
  	if current, ok := dslengine.CurrentDefinition().(*design.SecuritySchemeDefinition); ok {
  		if current.Kind == design.OAuth2SecurityKind {
  			current.Flow = "accessCode"
  			current.AuthorizationURL = authorizationURL
  			current.TokenURL = tokenURL
  			return
  		}
  	}
  	dslengine.IncompatibleDSL()
  }
docs: // AccessCodeFlow can be used in: OAuth2Security
  //
  // AccessCodeFlow defines an "access code" OAuth2 flow.  Use within an OAuth2Security definition.