code: public Kafka startFromSpecificOffsets(Map<Integer, Long> specificOffsets) {
  		this.startupMode = StartupMode.SPECIFIC_OFFSETS;
  		this.specificOffsets = Preconditions.checkNotNull(specificOffsets);
  		return this;
  	}
docs: Configures to start reading partitions from specific offsets, set independently for each partition.
  Resets previously set offsets.
  
  @param specificOffsets the specified offsets for partitions
  @see FlinkKafkaConsumerBase#setStartFromSpecificOffsets(Map)