/**
  * Initialise the passed in calculator with the MetaData for this message, if it is required as
  * part of the initial message imprint calculation.
  *
  * @param calculator the digest calculator to be initialised.
  * @throws CMSException if the MetaData is required and cannot be processed
  */
 public void initialiseMessageImprintDigestCalculator(DigestCalculator calculator)
     throws CMSException {
   util.initialiseMessageImprintDigestCalculator(calculator);
 }