qmk-dactyl-manuform-a/keyboards/yosino58/rev1/rev1.c

#include "yosino58.h"

#ifdef SSD1306OLED
void led_set_kb(uint8_t usb_led) {
    // put your keyboard LED indicator (ex: Caps Lock LED) toggling code here
    //led_set_user(usb_led);
}
#endif