theme(plot.margin) doesn't work for ggbreak

[Nitin123-4]

theme(plot.margin = margin(t = 2, l = 3, r = 2, b = 2, "cm")) has no impact when I am using scale_y_break.
ggplot(mtcars, aes(x=cyl, y=mpg)) +
geom_boxplot(fill="slateblue", alpha=0.2) +
xlab("cyl")+
scale_y_break(15,20)+
theme(plot.margin = margin(t = 2, l = 3, r = 2, b = 2, "cm"))

please help with it.

[drdna]

coord_cartesian(clip="off") also fails