Function gtk_sys::gtk_tree_view_enable_model_drag_source

pub unsafe extern "C" fn gtk_tree_view_enable_model_drag_source(
    tree_view: *mut GtkTreeView, 
    start_button_mask: GdkModifierType, 
    targets: *const GtkTargetEntry, 
    n_targets: c_int, 
    actions: GdkDragAction
)