M resizing windows.
So the save variable of type ArrayList whose element type is window state m resizing window is used
to store the list of windows being resized.
So similar to m resizing window.
There are other objects as well.
Impending removal.
So these.
This contains all the windows whose animation have ended and now must be removed.
M destroy surface.
So this contains the windows whose surface should be destroyed and force removed.
So this is set when the OS is run out of memory, when the system is run out of memory and this will
either be an empty list or contains windows that need to be forcibly removed.