library(ggVennDiagram)
venn <- Venn(list(A=1:3,B=2:5,C=c(1L,3L,5L)))
discern_overlap(venn, slice = "all")
# is equal to
overlap(venn, slice = "all")
# however, `discern_overlap()` only contains specific region
discern_overlap(venn, slice = 1:2)
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