Nothing
test_that("to_integer works", {
expect_identical(fwildclusterboot:::to_integer(c("a", "b", "c")), 1:3)
expect_identical(fwildclusterboot:::to_integer(1:3), 1:3)
expect_identical(fwildclusterboot:::to_integer(2:4), 1:3)
expect_identical(fwildclusterboot:::to_integer(factor(c(1, 2, 3))), 1:3)
})
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