// Visitor FFI ({{ bridge_name }})
[DllImport(LibName, CallingConvention = CallingConvention.Cdecl, EntryPoint = "{{ fn_bridge_new }}")]
internal static extern IntPtr {{ bridge_name }}New(IntPtr vtable, IntPtr userData);
[DllImport(LibName, CallingConvention = CallingConvention.Cdecl, EntryPoint = "{{ fn_bridge_free }}")]
internal static extern void {{ bridge_name }}Free(IntPtr bridge);
[DllImport(LibName, CallingConvention = CallingConvention.Cdecl, EntryPoint = "{{ fn_options_set }}")]
internal static extern int {{ options_name }}Set{{ field_name }}(IntPtr options, IntPtr visitor);