public static long toUInt64(byte[] array, int index) throws IOException {
        checkByteArgument(array, index, 8);
        return convertFromBytes(array, index, 8);
    }
Returns a 64-bit unsigned integer converted from two bytes at a specified position in a byte array.

@param array Specify an array of bytes.
@param index Specify the starting position.
@return Returns a 64-bit unsigned integer formed by two bytes beginning at startIndex.
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/main/java/org/apache/tika/parser/microsoft/onenote/fsshttpb/util/LittleEndianBitConverter.java