Not possible to define placeholder

[klapperkopp]

I'd like to define a placeholder item, in case there is no value selected upfront.
This doesn't seem to work.

At the moment I solve this by adding a placeholder item into my array first and then not rendering a selection option for it, when opening the Picker Items.

categories: [
                {id: 0, name: 'Choose a category'},
                {id: 1, name: 'Art'},
                {id: 2, name: 'Music'}
            ],

{_.filter(categories, cat => cat.id != 0).map(cat =>
    <Picker.Item
        key={cat.id}
        label={cat.name}
        value={cat.id}
    />
)}

Is there any other way that is better?

I would like something like just setting the placeholder via the placeholder prop on the Picker, or just use the already existing prompt prop on the picker to display this.