title: How to #include <CoreGraphics/CoreGraphics.h> in Xcode 10
body: <p>Xcode 10 has changed the method for searching for header files. Specifically, it gives the warning:</p>
  
  <blockquote>
    <p>Traditional headermap style is no longer supported; please migrate to
    using separate headermaps and set 'ALWAYS_SEARCH_USER_PATHS' to NO.</p>
  </blockquote>
  
  <p>So, having done that, it's then necessary to juggle around some other (mainly third-party) paths in the projects search paths in order for them to be found.</p>
  
  <p>However, I'm running into a problem when I need to include <code>CoreGraphics.h</code>. (It's not a question of if I need to, but how to do it.) It's buried deep in the framework tree — something I thought the whole "headermap" idea was supposed to solve.</p>
  
  <p>What's the correct method to include framework header(s) now?</p>
  
  <p>Note: The source files are either .cpp or .mm (either C++ or Objective-C++).</p>