title: AbsoluteToNanoseconds vs AbsoluteToDuration
body: <p>Apple has extremely comprehensive documentation, but I can't find any documentation for the function AbsoluteToNanoseconds? I was to find the difference between AbsoluteToNanoseconds and AbsoluteToDuration.</p>
  
  <p><strong>Note</strong></p>
  
  <p>I am beginning to think that the Apple Docs only cover Objective-C functions? Is this the case?</p>
  
  <p>I found the following by using Apple-double-click:</p>
  
  <p>Duration                32-bit millisecond timer for drivers
  AbsoluteTime            64-bit clock</p>