*** Formula: [true, false, null]
*** Item DType: b?
true
false
null

*** Formula: [1, 2, 3, null]
*** Item DType: i8?
1
2
3
null

*** Formula: ["Test string", "", null]
*** Item DType: s
"Test string"
""
null

*** Formula: Chain(Map(Range(5), {A: it, B: "A" & ToText(it)}), [null])
*** Item DType: {A:i8, B:s}?
{"A":0,"B":"A0"}
{"A":1,"B":"A1"}
{"A":2,"B":"A2"}
{"A":3,"B":"A3"}
{"A":4,"B":"A4"}
null

*** Formula: [CastDate("1/1/2021"), null]
*** Item DType: d?
"2021-01-01T00:00:00"
null

*** Formula: [ CastGen(1729), 2.718, "foo", CastDate("07/20/1969"), { A: "bar" }, ("fizz", "buzz"), [CastGen("baz"), 3.14]]
*** Item DType: g
null
null
null
null
null
null
null

*** Formula: [ { A: 3, B: CastGen(true) }, { A: 4, B: "hi" } ]
*** Item DType: {A:i8, B:g}
{"A":3,"B":null}
{"A":4,"B":null}

