code: public static boolean check(LocPathIterator path)
  	{
  		HasPositionalPredChecker hppc = new HasPositionalPredChecker();
  		path.callVisitors(null, hppc);
  		return hppc.m_hasPositionalPred;
  	}
docs: Process the LocPathIterator to see if it contains variables
  or functions that may make it context dependent.
  @param path LocPathIterator that is assumed to be absolute, but needs checking.
  @return true if the path is confirmed to be absolute, false if it
  may contain context dependencies.