question: public static ArrayList < ByteString > byteArraysToStrings ( ArrayList < byte [ ] > byteArrays ) { if ( byteArrays == null ) { return null ; } ArrayList < ByteString > byteStrings = new ArrayList < ByteString > ( ) ; for ( byte [ ] bytes : byteArrays ) { byteStrings . add ( ByteString . of ( bytes ) ) ; } return byteStrings ; }
target:  Converts an ArrayList<byte[]> to an ArrayList<ByteString>. If the input is an empty list, the output is an empty list. If the input is null, the output is null.