[R-meta] Determining if an rma.mv model is singular

[Stefanou Revesz]

Dear Wolfgang and list members,

Is there any function or code for rma.mv models that would work like
lme4::isSingular()?

I ask this because, given a fixed number of moderators, I sometimes
want to empirically explore how much room for adding random effects in
rma.mv I have before my model becomes singular but I don't know how to
do that.

Thank you so much,
Stefanou