code: public static boolean areMappedObjects(Class<?> dClass,Class<?> sClass,XML xml){
  		return isMapped(dClass,xml) || isMapped(sClass,xml);
  	}
docs: returns true if almost one class is configured, false otherwise.
  @param dClass class to verify
  @param sClass class to verify
  @param xml xml to check
  @return true if almost one class is configured, false otherwise.