How to document a method in Objective C?

Want to document your code, as is done in the source language; in order by pressing Option and clicking on a method, you could see something as follows:



I tried to use Javadoc and similarly documented method:

/**
 Method get something
 @param string some parameter
 @return returns something
*/
+ (NSString *)getOpenOrdersCount;

And it turns out like this:



Can you give an example how to document your code in order by pressing option and clicking it shows the window with complete data (not only declared)?