extern uint32_t layer_state;
void layer_debug(void);
void layer_clear(void);
+bool layer_state_is(uint8_t layer);
+bool layer_state_cmp(uint32_t layer1, uint8_t layer2);
void layer_move(uint8_t layer);
void layer_on(uint8_t layer);
void layer_off(uint8_t layer);