Create a simple utility class that stores and retrieves values using a Map. This question introduces the basic concept of key-value storage in Apex.
Examples:
Input:
storeValue('name', 'John')
getValue('name')
Output: 'John'
Explanation: The value 'John' was stored with key 'name' and then retrieved
Input:
storeValue('age', '25')
getValue('age')
Output: '25'
Explanation: The value '25' was stored with key 'age' and then retrieved
Input:
getValue('address')
Output: ''
Explanation: No value exists for key 'address', so an empty string is returned
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