question: public static byte [ ] [ ] convert ( final MultipartFile ... files ) throws IOException { if ( files != null ) { final List < Resource > resources = new ArrayList < Resource > ( files . length ) ; for ( final MultipartFile file : files ) { resources . add ( new MultipartFileResourceAdapter ( file ) ) ; } return convert ( resources . toArray ( new Resource [ resources . size ( ) ] ) ) ; } return new byte [ 0 ] [ ] ; }
target:  Converts the array of MultipartFiles into a 2-dimensional byte array containing content from each MultipartFile. The 2-dimensional byte array format is used by Gfsh and the GemFire Manager to transmit file data. <p/>