$to
$to :
Edge is a directed edge
__construct(\Trismegiste\Mondrian\Graph\Vertex $from, \Trismegiste\Mondrian\Graph\Vertex $to)
Since edge has one source vertex and one target vertex it is builded with two vertices in its constructor
| \Trismegiste\Mondrian\Graph\Vertex | $from | |
| \Trismegiste\Mondrian\Graph\Vertex | $to |
getSource() : \Trismegiste\Mondrian\Graph\Vertex
Get the source vertex
getTarget() : \Trismegiste\Mondrian\Graph\Vertex
Get the target vertex