function forwardFocusToTabDummy(oTable, sTabDummyCSSClass) {
		oTable._getKeyboardExtension().setSilentFocus(oTable.$().find("." + sTabDummyCSSClass));
	}
Sets the focus to the corresponding column header of the last known cell position.

@param {sap.ui.table.Table} oTable Instance of the table.
@param {string} sTabDummyCSSClass The css class of the tab dummy element to be used in a selector.
@private
@static