qmk-dactyl-manuform-a/keyboards/spaceman/2_milk/keymaps/mikethetiger/keymap.c

#include QMK_KEYBOARD_H

const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
      [0] = LAYOUT(
          KC_VOLU,
          KC_VOLD
          )
};