vic_poa <- c(3021L, 3084L, 3013L, 3147L, 3030L,
3123L, 3070L, 3004L, 3250L, 3630L)
postcode2ste(vic_poa)
postcode2ste(vic_poa, result = "character")
postcode2ste(c(vic_poa, 2000L))
postcode2ste(3644L)
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