R Under development (unstable) (2024-03-07 r86063 ucrt) -- "Unsuffered Consequences"
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> library(survey)
Loading required package: grid
Loading required package: Matrix
Loading required package: survival

Attaching package: 'survey'

The following object is masked from 'package:graphics':

    dotchart

> data(api)
> dstrat<-svydesign(id=~1,strata=~stype, weights=~pw, data=apistrat, fpc=~fpc)
> 
> a<-svyby(~enroll,~stype,design=dstrat,svytotal,vartype=c("ci","se"))
> b<-svyby(~enroll,~stype,design=dstrat,svytotal,vartype=c("se","ci"))
> 
> 
> stopifnot(all.equal(SE(a),SE(b)))
> 
> proc.time()
   user  system elapsed 
   1.14    0.12    1.20