Xcode does not appear to search Library/Frameworks for a framework file that is included in a project

Trying to build a project after including a header file from a framework located in `Library/Frameworks` fails because the file cannot be found. It looks like `Library/Frameworks` is not searched even after adding the framework path in the Build.cs file.

1. Create a new Basic Code project.
2. Add a new Actor code class to the project.
3. Close the Editor.
4. Add the following code to the project's Build.cs file:

   PublicFrameworks.AddRange(
                 new string[]
                 {
                     "/Library/Frameworks/iTunesLibrary.framework"
                 }
                 );
   

5. Add the following include to the new Actor code class: #include <iTunesLibrary/iTunesLibrary.h>
6. Build the project in Xcode.

RESULT:
The build fails with the following error: 'iTunesLibrary/iTunesLibrary.h' file not found

EXPECTED:
The build completes successfully.