/// <summary>
 /// Shortcuts ChecksumUpdateRegion.ForAdler.
 /// </summary>
 /// <param name="stm"></param>
 /// <param name="adler"></param>
 /// <returns></returns>
 public static ChecksumUpdateRegion GetAdlerUpdateRegion(this MemoryStream stm, Adler32 adler)
 {
     return(ChecksumUpdateRegion.ForAdler(stm, adler));
 }
 /// <summary>
 /// Shortcuts ChecksumUpdateRegion.ForCrc.
 /// </summary>
 /// <param name="stm"></param>
 /// <param name="crc"></param>
 /// <returns></returns>
 public static ChecksumUpdateRegion GetCrcUpdateRegion(this MemoryStream stm, uint?crc = null)
 {
     return(ChecksumUpdateRegion.ForCrc(stm, crc));
 }