gtk:render-frame-gap (context cr x y width height side xy0 xy1)

context -- a gtk:style-context object
cr -- a cairo:context-t context
x -- a number coerced to a double float for the x origin of the rectangle
y -- a number coerced to a double float for the y origin of the rectangle
width -- a number coerced to a double float for the rectangle width
height -- a number coerced to a double float for the rectangle height
side -- a value of the gtk:position-type enumeration where the gap is
xy0 -- a number coerced to a double float for the initial coordinate of the gap
xy1 -- a number coerced to a double float for the end coordinate of the gap

Renders a frame around the rectangle defined by x, y, width, height leaving a gap on one side. The arguments xy0 and xy1 will mean x coordinates for :top and :bottom gap sides, and y coordinates for :left and :right gap sides. The gtk:render-frame-gap function has been deprecated since version 3.24 and should not be used in newly written code. Use the gtk:render-frame function instead. Themes can create gaps by omitting borders via CSS.