code: @Nullable
      public static <T extends IdentifiedDataSerializable> ConfigSupplier<T> supplierFor(@Nonnull Class<T> cls) {
          return CONFIG_SUPPLIERS.get(cls);
      }
docs: Factory method for providing {@link ConfigSupplier} instances for the given config class
  
  @param cls class of the config we're looking for
  @param <T> type of config class
  @return {@link ConfigSupplier} config supplier for the given config type
  @see com.hazelcast.spi.properties.GroupProperty#SEARCH_DYNAMIC_CONFIG_FIRST