Xcode - How to know which classes used or imported a certain class?

Question

For example, I have Class A (both header and cpp file), how do I know which cpp files or header files used Class A?

In Eclipse, I can Open Call Hierarchy to do this.

How do I do this in Xcode?

Answer 1

As convenient as this feature might be, unfortunately as of Xcode 4.3, this feature is still NOT present.