[Demonstration 1]

[Buggy Method]
@Override
protected void onSetInitialValue(boolean restorePersistedValue, Object defaultValue) {
    if (restorePersistedValue) {
        // Restore existing state
        currentValue = this.getPersistedStringList(DEFAULT_VALUE);
    } else {
        // Set default state from the XML attribute
        currentValue = new ArrayList<>(Arrays.asList(TextUtils.split((String) defaultValue, "‚‗‚")));
        persistStringList(currentValue);
    }
}

[Buggy Hunk]
currentValue = this.getPersistedStringList(DEFAULT_VALUE);

[Patch]
currentValue = getPersistedStringList(DEFAULT_VALUE);

[Demonstration 2]

[Buggy Method]
public void showToast(String msg) {
    Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();
}

[Buggy Hunk]
Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();

[Patch]
Toast.makeText(activity, msg, Toast.LENGTH_SHORT).show();