fnChangeContent = function (context, sType) {
                var that = context;
                if (sType === "content") {
                    fnRenderContent(that);
                } else if (sType === "buttons") {
                    fnRenderButtons(that);
                }

                // this fixes the height of the ToolPopup if the height exceeds the window height
                that._proxyFixSize();
                // If the height/width changed the Popup's position has to be fixed as well
                // Setting the arrow isn't needed after that because it happens inside "_applyPosition"
                that.oPopup._applyPosition(that.oPopup._oLastPosition);
            }
Sets the position of the pop up, the same parameters as for sap.ui.core.Popup can be used.

@public