# NOT RUN {
library(tidyr)
library(starschemar)
library(sf)
gms <- geomultistar(ms = ms_mrs, geodimension = "where") %>%
define_geoattribute(
attribute = "city",
from_layer = usa_cities,
by = c("city" = "city", "state" = "state")
)
empty <- gms %>%
get_empty_geoinstances(attribute = "city")
# }
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