system.nav.swapWindow(swapFromPath, swapToPath [, params])
String swapFromPath - The path of the window to swap from. Must be a currently open window, or this will act like an openWindow.
String swapToPath - The name of the window to swap to.
PyDictionary params - A dictionary of parameters to pass into the window. The keys in the dictionary must match dynamic property names on the target window's root container. The values for each key will be used to set those properties. [optional]
PyObject - A reference to the swapped-to window.