code: public static Single<Boolean> remove(CacheConfigBean cacheConfigBean, String key, String field) {
          return SingleRxXian.call(CacheService.CACHE_SERVICE, "cacheMapRemove", new JSONObject() {{
              put("cacheConfig", cacheConfigBean);
              put("key", key);
              put("field", field);
          }}).map(unitResponse -> {
              unitResponse.throwExceptionIfNotSuccess();
              long result = Objects.requireNonNull(unitResponse.dataToLong());
              return result > 0;
          });
      }
docs: remove the elements in the map
  
  @param cacheConfigBean the datasource configuration
  @param key             the key
  @param field           the field
  @return true if any elements are removed. False if no fields are removed, which means the field is not in the map originally.