This function should almost never be used. It is meant for private use by ATK for determining the number of visible children that are removed when the user collapses a row, or a row is deleted.
Function to be called when a view row is destroyed, or NULL. [allow-none]
User data to be passed to func, or NULL. [allow-none]
Destroy notifier for data, or NULL. [allow-none]
See Implementation
This function should almost never be used. It is meant for private use by ATK for determining the number of visible children that are removed when the user collapses a row, or a row is deleted.