Available since LÖVE 0.10.2  
 This function is not supported in earlier versions. 
Sets a vertex that establishes a connection to the previous shape.
This can help prevent unwanted collisions when a flat shape slides along the edge and moves over to the new shape.
EdgeShape:setPreviousVertex( x, y )
Nothing.
    © 2006–2016 LÖVE Development Team
Licensed under the GNU Free Documentation License, Version 1.3.
    https://love2d.org/wiki/EdgeShape:setPreviousVertex