getRequiredProperty method
Returns the property value for key, or throws IllegalStateException if the property is not defined.
This is useful for required configuration values such as API keys.
Example:
final apiKey = resolver.getRequiredProperty('security.apiKey');
Implementation
@override
String getRequiredProperty(String key) {
String? value = getProperty(key);
if (value == null) {
throw IllegalStateException("Required key '$key' not found");
}
return value;
}