private @Nullable XSourcePosition convert(String path, int line) {
    final VirtualFile file = getVirtualFile(path);
    XSourcePosition xPosition = createXSourcePosition(file, line);
    if (xPosition != null) {
      return new XRemoteSourcePosition(xPosition);
    }
    else {
      return null;
    }
  }
private @Nullable XSourcePosition convert(String path, int line)