An abstract class BankAccount is provided with a balance field, a deposit(double amount) method, and an abstract withdraw(double amount) method.

Create a SavingsAccount class that extends BankAccount.

Requirements:
1. Constructor takes an initial balance and passes it to super().
2. Implement withdraw(double amount): only subtract from balance if amount <= balance. If not enough funds, do nothing.
3. Add a getBalance() method that returns the current balance.

Do NOT write a main method.