[R-meta] Extractable objects from an rma.mv() objects

Hello Meta-Analysis Experts,

I'm exploring some apparently undocumented, extractable objects from fitted
metafor::rma.mv() models.

Specifically, I was wondering what do the following undocumented boolean
objects denote (withS, withG, withH, and withR)?

Much appreciated,
Jack

library(metafor)
dat <- dat.konstantopoulos2011

m1 <- rma.mv(yi, vi, random = ~ 1 | district/study, data = dat)

m1$withS
m1$withG
m1$withH
m1$withR