GraftKeyCreator \ Modify \ Boolean \ Graft
Use the Graft function to Boolean one body (called a tool body) from another (called a target body). Unlike a standard Boolean, if the tool and target bodies do not intersect, the tool body will be tweaked into the target body. In other words, the adjacent faces of the tool body are extended into the target body.
Using the Function:
The dynahandle for Z axis is omitted (showing only a blue vector arrow) as the graft is limited to a plane.