/// <summary>
/// Adds the new context item to the current instance. If an item of the given type already exists on
/// this context, it is replaced with this new item. When a null vaue is supplied it is automatically
/// skipped.
/// </summary>
/// <param name="item">The item in question.</param>
protected void AddOrUpdateContextItem(IDocumentPart item)
{
this.AddOrUpdateContextItem(item, item?.GetType());
}
/// <summary>
/// Adds the argument to the collection of arguments on this instance.
/// </summary>
/// <param name="child">The child.</param>
public virtual void AddChild(IDocumentPart child)
{
throw new InvalidOperationException($"{this.GetType().FriendlyName()} cannot contain children of type '{child?.GetType()}'");
}
/// <summary>
/// Adds the argument to the collection of arguments on this instance.
/// </summary>
/// <param name="child">The child.</param>
public override void AddChild(IDocumentPart child)
{
throw new InvalidOperationException($"{nameof(QueryEnumInputValue)} cannot contain children of type '{child?.GetType()}'");
}