getSequence(topic, partition) {
        if (!eosManager.isInitialized()) {
          return SEQUENCE_START
        }

        producerSequence[topic] = producerSequence[topic] || {}
        producerSequence[topic][partition] = producerSequence[topic][partition] || SEQUENCE_START

        return producerSequence[topic][partition]
      }
Get the current sequence for a given Topic-Partition. Defaults to 0.

@param {string} topic
@param {string} partition
@returns {number}