clang/test/Modules/Inputs/private/module.modulemap - third_party/llvm-project - Git at Google

 module libPrivate1 {
   header "public1.h"
   private header "private1.h"
 }

 module libPrivate2 {
   header "public2.h"
   private header "private2.h"
 }
	module libPrivate1 {
	header "public1.h"
	private header "private1.h"
	}

	module libPrivate2 {
	header "public2.h"
	private header "private2.h"
	}