@Override
  public String toString() {
    ToStringHelper helper =
      MoreObjects.toStringHelper(this).add("readPoint", readPoint).add("writePoint", writePoint);
    if (this.regionName != null) {
      helper.add("regionName", this.regionName);
    }
    return helper.toString();
  }
Wait for the global readPoint to advance up to the passed in write entry number.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MultiVersionConcurrencyControl.java