Key legal question
Whether the prior cantonal interlocutory decision refusing an expert opinion could be reviewed in the federal appeal
Extracted holding
The interlocutory decision could not be challenged independently because it caused no irreparable harm and was only reviewable insofar as it affected the final judgment.
Extracted reasoning
The refusal of an expertise could be cured in the course of the proceedings; the requirements for direct appeal of an interlocutory decision were not met.