Extractor unavailable for a legacy cross-family Julia fit

The cross-family Julia bridge is retained only to inspect legacy fitted objects. It does not marshal a named coefficient covariance matrix, so covariance-based fixed-effect inference cannot be reconstructed safely.

Usage

# S3 method for class 'drmTMB_julia_xfam'
vcov(object, ...)

Arguments

object: A drmTMB_julia_xfam cross-family fit.
...: Unused.

Value

This method always errors with an explanation.