Whether the blanks of an array result stay blank when it spills. Omitted, they read as
0, as any spilled array's blanks do.
Remarks
For data whose empty fields mean "nothing here", such as an imported file. The result
keeps them while a formula passes it on as it is (IF(c, result, …)). A function that
answers element by element builds a new array, whose blanks read as 0
(IFERROR(result, …), result & "").
Options for DeferredCall.resolve.