Returns whether @tool_item is visible when the toolbar is docked vertically. See gtk_tool_item_set_visible_vertical().
Return: Whether @tool_item is visible when the toolbar is docked vertically
2.4
See Implementation
Returns whether @tool_item is visible when the toolbar is docked vertically. See gtk_tool_item_set_visible_vertical().
Return: Whether @tool_item is visible when the toolbar is docked vertically