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