Draws a line from the current point to a point offset from it by x, y and makes it the new current point.
This is the relative version of gsk.path_builder.PathBuilder.lineTo.
x offset
y offset
Draws a line from the current point to a point offset from it by x, y and makes it the new current point.
This is the relative version of gsk.path_builder.PathBuilder.lineTo.