code: public Builder<T> useSerializerInRam(
          int maxRamSizeBytes, CacheSerializer<T> serializer
      ) {
          this.ramMode = DualCacheRamMode.ENABLE_WITH_SPECIFIC_SERIALIZER;
          this.maxRamSizeBytes = maxRamSizeBytes;
          this.ramSerializer = serializer;
          return this;
      }
docs: Use Json serialization/deserialization to store and retrieve object from ram cache.
  
  @param maxRamSizeBytes is the max amount of ram in bytes which can be used by the ram cache.
  @param serializer      is the cache interface which provide serialization/deserialization
  methods
  for the ram cache layer.
  @return the builder.