ANDROID_ASSETS_DIRECTORIES
Set the Android assets directories to copy into the main assets folder before build. This a string property that contains the directory paths separated by semicolon. This property is initialized by the value of the CMAKE_ANDROID_ASSETS_DIRECTORIES variable if it is set when a target is created.
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Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.15/prop_tgt/ANDROID_ASSETS_DIRECTORIES.html