# NOT RUN {
item1 <- structure(c(1L, 1L, 1L, 1L), .Names = c("1", "2", "3", "4"))
item2 <- structure(c(1L, 1L, 2L, 2L), .Names = c("1", "2", "3", "4"))
lowest_common_branch(item1, item2)
# }
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