Enables or disables the hover selection mode of @tree_view. Hover selection makes the selected row follow the pointer. Currently, this works only for the selection modes gtk.types.SelectionMode.Single and gtk.types.SelectionMode.Browse.
This mode is primarily intended for treeviews in popups, e.g. in #GtkComboBox or #GtkEntryCompletion.
Builder instance for fluent chaining
Set hoverSelection property.