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+# Virtual A/B makefiles
+
+Devices that uses Virtual A/B must inherit from one of the makefiles in this directory.
+
+## Structure
+
+```
+launch.mk
+ |- retrofit.mk
+ |- plus_non_ab.mk
+
+launch_with_vendor_ramdisk.mk
+ |- compression.mk
+
+compression_retrofit.mk
+```