+/// \enum GeomAlgoAPI_OffsetJoint
+/// \brief Type of joint of straight edges in 2D offset
+/// \a KeepDistance Keep the distance from initial contour to the resulting one,
+/// creating contour from lines and arcs where it is needed
+/// \a Arcs On connection of straight edges, tangent arcs are created,
+/// except the case of too short edges. Radius of arcs equals to the offset value.
+/// \a Lines No arcs is created on the connection of the resulting lines,
+/// adjacent lines are prolonged to the point of their intersection.
+enum class GeomAlgoAPI_OffsetJoint { KeepDistance, Arcs, Lines };
+