/// <summary>
/// Adds some sortItem to the aggregation {@link #getSortItems sortItems}.
/// </summary>
/// <param name="oSortItem">The sortItem to add; if empty, nothing is inserted</param>
/// <returns>Reference to <code>this</code> in order to allow method chaining</returns>
public extern virtual sap.m.P13nSortPanel addSortItem(sap.m.P13nSortItem oSortItem);
/// <summary>
/// Checks for the provided <code>sap.m.P13nSortItem</code> in the aggregation {@link #getSortItems sortItems}. and returns its index if found or -1 otherwise.
/// </summary>
/// <param name="oSortItem">The sortItem whose index is looked for</param>
/// <returns>The index of the provided control in the aggregation if found, or -1 otherwise</returns>
public extern virtual int indexOfSortItem(sap.m.P13nSortItem oSortItem);
/// <summary>
/// Inserts a sortItem into the aggregation {@link #getSortItems sortItems}.
/// </summary>
/// <param name="oSortItem">The sortItem to insert; if empty, nothing is inserted</param>
/// <param name="iIndex">The <code>0</code>-based index the sortItem should be inserted at; for a negative value of <code>iIndex</code>, the sortItem is inserted at position 0; for a value greater than the current size of the aggregation, the sortItem is inserted at the last position</param>
/// <returns>Reference to <code>this</code> in order to allow method chaining</returns>
public extern virtual sap.m.P13nSortPanel insertSortItem(sap.m.P13nSortItem oSortItem, int iIndex);