public Form showForm(String resourceName,Command sourceCommand){
  Form f=(Form)createContainer(fetchResourceFile(),resourceName);
  showForm(f,sourceCommand,null);
  return f;
}

public Form showForm ( String resourceName , Command sourceCommand ) { Form f = ( Form ) createContainer ( fetchResourceFile ( ) , resourceName ) ; showForm ( f , sourceCommand , null ) ; return f ; }
this method is equivalent to the internal navigation behavior , it adds functionality such as the back command into the given form resource and shows it . if the source command is the back command the showback ( ) method will run .
