src/vs/base/common/scanCode.ts/define
	function define(code: ScanCode, keyCode: KeyCode): void {
		IMMUTABLE_CODE_TO_KEY_CODE[code] = keyCode;

		if (
			(keyCode !== KeyCode.Unknown)
			&& (keyCode !== KeyCode.Enter)
			&& (keyCode !== KeyCode.Ctrl)
			&& (keyCode !== KeyCode.Shift)
			&& (keyCode !== KeyCode.Alt)
			&& (keyCode !== KeyCode.Meta)
		) {
			IMMUTABLE_KEY_CODE_TO_CODE[keyCode] = code;
		}
	}