Map your result set records to node and edge properties required
to build a graph. Learn more about result set requirements in the
documentation.
A field indicating if the record is node (value 0) or edge
(value 1).
A field keeping unique node identifier.
A field keeping a node identifier where the edge starts.
A field keeping a node identifier where the edge ends.
If you already built a graph using another layout, the initial
algorithm doesn't apply unless you restart it.