public Long getAssignedPartOffset(String partitionKey) {
        return this.assignedPartMap.get(partitionKey);
    }
Set Bound Consumption information

@param sessionKey     consume session key
@param sourceCount    the client count of consume group
@param isSelectBig    whether select a bigger data If there is reset conflict
@param partOffsetMap  the map of partitionKey and bootstrap offset
inlong-tubemq/tubemq-client/src/main/java/org/apache/inlong/tubemq/client/consumer/ClientSubInfo.java