[Demonstration 1]

[Buggy Method]
public boolean newAccount(String type, String name, float balance) throws IllegalArgumentException {
    if (balance < 0.0f)
        throw new IllegalArgumentException("New account may not be started with a negative balance");
    return newAccountFactory(type, name, balance);
}

[Buggy Hunk]
return newAccountFactory(type, name, balance);

[Patch]
return _newAccountFactory(type, name, balance);

[Demonstration 2]

[Buggy Method]
@Override
public void showEmptyClientIdentifier() {
    ll_error.setVisibility(View.VISIBLE);
    mNoIdentifierText.setText(getResources().getString(R.string.no_identifier_to_show));
    mNoIdentifierIcon.setImageResource(R.drawable.ic_assignment_turned_in_black_24dp);
}

[Buggy Hunk]
ll_error.setVisibility(View.VISIBLE);

[Patch]
llError.setVisibility(View.VISIBLE);