I've implemented parsing of associations like a sequence flow.
Also now I can draw annotation and any connections with different arrows and strokes(but without labels and images on it): sequence flows, associations, messages. But not a Conversation Link (I actually don't know is there any simple way to draw "double" stroke).
Look at the "Table 12.35 ��� Depiction Resolution for Connecting Objects"
And now I'm looking for "how it works" - git, and how to create patch with git for publish this improvement, I'm new in it.
It doesn't parse message flows yet, i just created a 'hook' just for draw all this connections.