Key legal question
Whether the cancellation of the witness hearing could be challenged immediately before the Federal Tribunal under Art. 93 LTF
Extracted holding
No immediate appeal lay because the challenged order was incidental and did not cause irreparable legal harm.
Extracted reasoning
Decisions on evidence-taking and case management normally do not create irreparable legal prejudice. The witness could be sought again later before the authority directing the proceedings or at trial, and any refusal could be challenged against the final judgment.