@Override
  public java.lang.String toString() {
    java.lang.StringBuilder sb = new java.lang.StringBuilder("TIOError(");
    boolean first = true;

    if (isSetMessage()) {
      sb.append("message:");
      if (this.message == null) {
        sb.append("null");
      } else {
        sb.append(this.message);
      }
      first = false;
    }
    if (isSetCanRetry()) {
      if (!first) sb.append(", ");
      sb.append("canRetry:");
      sb.append(this.canRetry);
      first = false;
    }
    sb.append(")");
    return sb.toString();
  }
Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise
hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift2/generated/TIOError.java