Layer stack is uninitialized by default. However, when a layer is toggled, the base layer does not get pushed (as a stack base) and later when untoggle attempt is made, top (the toggled) layer is protected as base layer since it is the only one in the stack.
Layer stack is uninitialized by default. However, when a layer is toggled, the base layer does not get pushed (as a stack base) and later when untoggle attempt is made, top (the toggled) layer is protected as base layer since it is the only one in the stack.