code: public List<ItemFieldDifference> getItemRevisionDifference(int itemId,
  			int revisionFrom, int revisionTo) {
  		return getResourceFactory().getApiResource(
  				"/item/" + itemId + "/revision/" + revisionFrom + "/"
  						+ revisionTo).get(
  				new GenericType<List<ItemFieldDifference>>() {
  				});
  	}
docs: Returns the difference in fields values between the two revisions.
  
  @param itemId
  The id of the item
  @param revisionFrom
  The from revision
  @param revisionTo
  The to revision
  @return The difference between the two revision