title: Calling external method from member method in UML Sequence Diagram
body: <p><a href="http://i.stack.imgur.com/qwo0G.jpg" rel="nofollow">EXAMPLE DIAGRAM</a></p>
  
  <p>Hi,</p>
  
  <p>I am not very experienced in UML, so this is probably a very simple question. How can I depict a method call to a different class from a member method call? Or am I supposed to show this? </p>
  
  <p>For example, class Foo has a "FooMethod". Class Bar has a "BarMethod". Foo calls FooMethod, which calls BarMethod before returning. </p>
  
  <p>To show this, I draw a self method call in Foo's lifeline. Then I draw a method call to Bar in the gap between Foo's self call's start and end. The diagram in the top link depicts this situation. Is it correct?</p>
  
  <p>Thanks</p>