[System.Xml.Serialization.XmlElement("element", typeof(System.Xml.Schema.XmlSchemaElement))]
[System.Xml.Serialization.XmlElement("group", typeof(System.Xml.Schema.XmlSchemaGroupRef))]
[System.Xml.Serialization.XmlElement("choice", typeof(System.Xml.Schema.XmlSchemaChoice))]
[System.Xml.Serialization.XmlElement("sequence", typeof(System.Xml.Schema.XmlSchemaSequence))]
[System.Xml.Serialization.XmlElement("any", typeof(System.Xml.Schema.XmlSchemaAny))]
public override XmlSchemaObjectCollection Items { get; }