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• POLYLINE
  Edges consist of one or more segments defined by a list of bend points.
• ORTHOGONAL
  Edges are routed orthogonally, meaning that each segment of an edge runs either horizontally or vertically, but never at an angle.
• SPLINE
  Edges are routed as splines (smooth curves). TODO: Add more documentation on how the returned bend points are to be interpreted.
• UNDEFINED
  No particular edge routing style is selected. The result produced by the layout algorithm may be undefined.

TODO: Add an image illustrating the different routing styles.

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