Check device is currently locked

isDeviceLocked.java

/**
     * Returns true if the device is locked or screen turned off (in case password not set)
     */
    public static boolean isDeviceLocked(Context context) {
        boolean isLocked = false;

        // First we check the locked state
        KeyguardManager keyguardManager = (KeyguardManager) context.getSystemService(Context.KEYGUARD_SERVICE);
        boolean inKeyguardRestrictedInputMode = keyguardManager.inKeyguardRestrictedInputMode();

        if (inKeyguardRestrictedInputMode) {
            isLocked = true;

        } else {
            // If password is not set in the settings, the inKeyguardRestrictedInputMode() returns false,
            // so we need to check if screen on for this case

            PowerManager powerManager = (PowerManager)context.getSystemService(Context.POWER_SERVICE);
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT_WATCH) {
                isLocked = !powerManager.isInteractive();
            } else {
                //noinspection deprecation
                isLocked = !powerManager.isScreenOn();
            }
        }

        Loggi.d(String.format("Now device is %s.", isLocked ? "locked" : "unlocked"));
        return isLocked;
    }

what is "Loggi " here ?