code: private boolean isLoopExitCondition() {
  		while (workingDirectory.index == workingDirectory.files.length) {
  			if (stack.isEmpty()) {
  				return true;
  			}
  			pop();
  		}
  		return false;
  	}
docs: Test for iteration loop exit condition. Iteration loop is ended if current working directory index reaches its files
  count and there is no more directories on stack.
  
  @return true if iterator loop reach its end.