private void addProblem(@NotNull VFSInitException.ErrorCategory type,
                          @NotNull String message,
                          @Nullable Throwable cause) {
    LOG.warn("[VFS load problem]: " + message, cause);
    if (cause == null) {
      this.problemsDuringLoad.add(new VFSInitException(type, message));
    }
    else {
      this.problemsDuringLoad.add(new VFSInitException(type, message, cause));
    }
  }
private void addProblem(@NotNull VFSInitException.ErrorCategory type,
                          @NotNull String message,
                          @Nullable Throwable cause)