AbstractPops the current clip rectangle from the clip stack. It is a programming error to call this without a corresponding PickContext.push_clip call first.
Pops the current transform from the clip stack. It is a programming error to call this without a corresponding PickContext.push_transform call first.
Pushes a clip rectangle defined by box into the pick stack. Pop with
PickContext.pop_clip when done.
Pushes transform into the pick stack. Pop with
PickContext.pop_transform when done.
Retrieves the current transform of the pick stack.