text.append("@relation " + Utils.quote(m_RelationName) + "\n\n");
text.append(ARFF_RELATION).append(" ").append(Utils.quote(m_RelationName)).append("\n\n");
  public final String toString() {        StringBuffer text = new StringBuffer();        text.append("@relation " + Utils.quote(m_RelationName) + "\n\n");    for (int i = 0; i < numAttributes(); i++) {      text.append(attribute(i) + "\n");    }    text.append("\n@data\n");    for (int i = 0; i < numInstances(); i++) {      text.append(instance(i));      if (i < numInstances() - 1) {	text.append('\n');      }    }    return text.toString();  }