# NOT RUN {
r <- raster(ncol=3, nrow=3)
values(r) <- 1:ncell(r)
as.character(r)
s <- stack(r, r)
as.character(s)
as.character(extent(s))
x <- as.character(s)
eval(parse(text=x))
y <- as.character(extent(s))
eval(parse(text=y))
# }
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