code: private static Set<Interaction> getInter(Match match)
  	{
  		Set<Interaction> set = new HashSet<Interaction>();
  		for (BioPAXElement ele : match.getVariables())
  		{
  			if (ele instanceof Interaction) 
  			{
  				set.add((Interaction) ele);
  				addControlsRecursive((Interaction) ele, set);
  			}
  		}
  		return set;
  	}
docs: Gets all interactions in a match.
  @param match match to search
  @return all interaction in the match