SpinnerItem.isVisible returns object Boolean instead of primitive boolean

[Isomorphic]

This method will validly return null if you call it in a circumstance when visibility cannot be known, such as before the item has been added to the form, or before the form has drawn.

[Blama]

Hi Isomorphic,

I recently got a exception when using !SpinnerItem.isVisible() in v10.1p_2016-07-05.
This is because the value returned was null, but should be either true or false.

Could you make this method return a primitive?

This is related to these bugs.

Generally speaking it would be good if all similar methods would return a primitive true/false, as this happens once in a while.

Thank you & Best regards
Blama