Table.ToRows() doesn't work for non-public F# records

[dvoits]

Description

When I declare an internal F# record and then use it as a generic type parameter for Table.ToRows(), it throws ArgumentNullException.

Repro steps

type internal InternalRecord = { x: float }
    
[<Test; Category("CI")>]
let ``Table.ToRows works for internal records``() =
    let t = Table.OfColumns [Column.Create("x", [1.0])]
    let rows = t.ToRows<InternalRecord>() |> Seq.toList
    Assert.AreEqual([ {x=1.0} ], rows)

Expected behavior

The given test must pass.

Actual behavior

Throws an exception when calling t.ToRows.

Known workarounds

Make the record public.