Function gsk_path_builder_rel_svg_arc_to 

pub unsafe extern "C" fn gsk_path_builder_rel_svg_arc_to(
    self_: *mut GskPathBuilder,
    rx: c_float,
    ry: c_float,
    x_axis_rotation: c_float,
    large_arc: gboolean,
    positive_sweep: gboolean,
    x: c_float,
    y: c_float,
)