pango/pango-gravity.go
func GravityToRotation(gravity Gravity) float64 {
	c := C.pango_gravity_to_rotation((C.PangoGravity)(gravity))
	return float64(c)
}
func GravityToRotation(gravity Gravity) float64 {
	c := C.pango_gravity_to_rotation((C.PangoGravity)(gravity))
	return float64(c)
}
//double       pango_gravity_to_rotation    (PangoGravity       gravity) G_GNUC_CONST;