code: @Override
  	public boolean satisfies(Match match, int... ind)
  	{
  		BioPAXElement ele0 = match.get(ind[0]);
  		BioPAXElement ele1 = match.get(ind[1]);
  
  		if (ele1 == null) return false;
  
  		Set vals = pa.getValueFromBean(ele0);
  		return vals.contains(ele1);
  	}
docs: Checks if the PathAccessor is generating the second mapped element.
  @param match current pattern match
  @param ind mapped indices
  @return true if second element is generated by PathAccessor