@Override
  public String toString() {
    StringBuilder sb = new StringBuilder();
    sb.append("{ NAME=> '");
    sb.append(name);
    sb.append('\'');
    for (Map.Entry<QName, Object> e : attrs.entrySet()) {
      sb.append(", ");
      sb.append(e.getKey().getLocalPart());
      sb.append(" => '");
      sb.append(e.getValue().toString());
      sb.append('\'');
    }
    sb.append(", COLUMNS => [ ");
    Iterator<ColumnSchemaModel> i = columns.iterator();
    while (i.hasNext()) {
      ColumnSchemaModel family = i.next();
      sb.append(family.toString());
      if (i.hasNext()) {
        sb.append(',');
      }
      sb.append(' ');
    }
    sb.append("] }");
    return sb.toString();
  }
@param columns the columns to set
hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/TableSchemaModel.java