pretty simple question with no documentation that I could find. is this the right way to get a 3x1 array of `missing`

s that at some point I may want to fill with with `Int`

?

```
julia> x = Union{Int64, Missings.Missing}[missing for i in 1:3]
3-element Array{Union{Int64, Missings.Missing},1}:
missing
missing
missing
julia> x[2] = 1
1
```

the other way I could think is a bit contrived, given that I would like to initiate to `missing`

```
julia> x=Vector{Union{Int64, Missings.Missing}}(3)
3-element Array{Union{Int64, Missings.Missing},1}:
#undef
#undef
#undef
julia> x[2] = 1
1
julia> x[1] = missing
missing
julia> x
3-element Array{Union{Int64, Missings.Missing},1}:
missing
1
#undef
```

cheers