Box.setRoundedCorners

setRoundedCorners([ r1 [, r2 [, r3 [, r4 ]]]])

Sets the border style to use rounded corners.

Argument	Default	Description
r1	10	The radius of the top-left rounded corner in pixels.
r2	-1	The radius of the top-right rounded corner in pixels. -1 means it is the same as the radius of the top-left corner.
r3	-1	The radius of the bottom-right rounded corner in pixels. -1 means it is the same as the radius of the top-left corner.
r4	-1	The radius of the bottom-left rounded corner in pixels. -1 means it is the same as the radius of the top-left corner.

None