-static uint16_t *matrix_prev;
-static uint16_t _matrix0[MATRIX_ROWS];
-static uint16_t _matrix1[MATRIX_ROWS];
+static uint16_t *matrix_debouncing;
+static uint16_t matrix0[MATRIX_ROWS];
+static uint16_t matrix1[MATRIX_ROWS];
+static bool is_modified;