/// <summary>
 /// id class constructor
 /// </summary>
 public id()
 {
     generatorField = new generator();
     typeField = new type();
     columnField = new List<Column>();
     metaField = new List<meta>();
 }
 /// <summary>
 /// collectionid class constructor
 /// </summary>
 public collectionid()
 {
     generatorField = new generator();
     columnField = new List<Column>();
     metaField = new List<meta>();
 }