code: public static <T> T setTombstone(T domainObject, boolean isTombstone) throws ConversionException
      {
          T obj = AnnotationHelper.getInstance().setRiakTombstone(domainObject, isTombstone);
          return obj;
      }
docs: Attempts to inject <code>isTombstone</code> as the value of the
  {@literal @RiakTombstone} annotated member of <code>domainObject</code>
  
  @param <T> the type of <code>domainObject</code>
  @param domainObject the object to inject the key into
  @param isTombstone the boolean to inject
  @return <code>domainObject</code> with {@literal @RiakTombstone} annotated
  member set to <code>isTombstone</code>
  @throws ConversionException if there is a {@literal @RiakTombstone} annotated
  member but it cannot be set to the value of <code>isTombstone</code>