internal static extern void cl_engine_set_clcb_pre_scan(IntPtr engine, clcb_pre_scan callback);
internal static extern void cl_engine_set_clcb_pre_scan(IntPtr engine, clcb_pre_scan callback);
internal static extern void cl_engine_set_clcb_pre_scan(IntPtr engine, clcb_pre_scan callback);
internal static extern void cl_engine_set_clcb_pre_scan(IntPtr engine, clcb_pre_scan callback);