code: public Set<String> getTypesWithActiveSchemaFormatters() {
  
          Set<String> result = Sets.newHashSet(getTypesWithModifiableFormatters());
          for (CmsFormatterChangeSet changeSet : getFormatterChangeSets()) {
              changeSet.applyToTypes(result);
          }
          return result;
      }
docs: Gets the set of resource type names for which schema formatters can be enabled or disabled and which are not disabled in this sub-sitemap.<p>
  
  @return the set of types for which schema formatters are active