onBuilderItem property
Custom builder for individual picker items.
This callback is invoked for each item in every column, allowing
complete customization of how items are displayed. If the callback
returns null, the default item rendering is used.
The builder receives information about the item's content, selection state, and position to enable context-aware customization.
See PickerItemBuilder for detailed parameter information.
Implementation
final PickerItemBuilder? onBuilderItem;