Explains the representation of various objects used to render the flow charts and what the properties mean. This ofc from the perspective of the dagre-wrapper.
## node
Sample object:
```json
{
"labelType":"svg",
"labelStyle":"",
"shape":"rect",
"label":{},
"labelText":"Test",
"rx":0,"ry":0,
"class":"default",
"style":"",
"id":"Test",
"type":"group",
"padding":15}
```
This is set by the renderer of the diagram and insert the data that the wrapper neds for rendering.
arrowType sets the type of arrows to use. The following arrow types are currently supported:
arrow_cross
double_arrow_cross
arrow_point
double_arrow_point
arrow_circle
double_arrow_circle
Lets try to make these types semantic free so that diagram type semantics does not find its way in to this more generic layer.
# Markers
Define what markers that should be included in the diagram with the insert markers function. The function takes two arguments, first the element in which the markers should be included and a list of the markers that should be added.
Ex:
insertMarkers(el, ['point', 'circle'])
The example above adds the markers point and cross. This means that edges with the arrowTypes arrow_cross, double_arrow_cross, arrow_point and double_arrow_cross will get the corresponding markers but arrowType arrow_cross will have no impact.
