priority property
The SideMenuPriority which is mode or sizer.
In SideMenuPriority.mode, the side menu width change based on mode value.
In SideMenuPriority.sizer, the side menu width not change if user set
custom size with Resizer
.
meaning of custom size is size that user want
and it's opposing minWidth and maxWidth values.
The SideMenuPriority.sizer available only if hasResizer is true.
Implementation
final SideMenuPriority priority;