docs: public static void copy(Path sourcePath, Path targetPath, boolean executable) throws IOException {
  		// we unwrap the file system to get raw streams without safety net
  		FileSystem sFS = FileSystem.getUnguardedFileSystem(sourcePath.toUri());
  		FileSystem tFS = FileSystem.getUnguardedFileSystem(targetPath.toUri());
  		if (!tFS.exists(targetPath)) {
  			if (sFS.getFileStatus(sourcePath).isDir()) {
  				internalCopyDirectory(sourcePath, targetPath, executable, sFS, tFS);
  			} else {
  				internalCopyFile(sourcePath, targetPath, executable, sFS, tFS);
  			}
  		}
  	}