If i'm using class in php that extends another class it will be use full to have inherited object as an item in navigator list over all methods. And that item should be expandable with all methods and inherited class of his self.

Simple Example:

PHP:

class A extends B {
  function x1();
  function x2();
}

class B extends C {
  function y1();
  function y2();
}

Navigator:

[-]A
  [-]B
     y1(): void
     y2(): void
  x1(): void
  x2(): void