# vld_not_subset
vld_not_subset(numeric(0), 1:10)
vld_not_subset(1, 1:10)
vld_not_subset(11, 1:10)
# chk_subset
chk_subset(1, 1:10)
try(chk_subset(11, 1:10))
# vld_subset
vld_subset(numeric(0), 1:10)
vld_subset(1, 1:10)
vld_subset(11, 1:10)
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