docs: public final ConfigChanges deleted(String schemaName, Collection<String> instanceIds) {
          ConfigChanges changes = new ConfigChanges();
          for (String instanceId : instanceIds) {
              BeanId id = BeanId.create(instanceId, schemaName);
              Optional<Bean> before = beanManager.getEager(id);
              if (!before.isPresent()) {
                  throw Events.CFG304_BEAN_DOESNT_EXIST(id);
              }
              Bean bean = before.get();
              schemaManager.setSchema(Arrays.asList(bean));
              changes.add(ConfigChange.deleted(bean));
          }
          return changes;
      }