/**
* Converts to an {@link PriceIndex}.
*
* <p>If this is a price index, then this returns the matching {@link PriceIndex}. If not, an
* exception is thrown.
*
* @return the index
* @throws IllegalStateException if the type is not a price index type
* @see #getType()
*/
public PriceIndex toPriceIndex() {
if (!type.isPrice()) {
throw new IllegalStateException("Incorrect index type, expected Price: " + name);
}
return PriceIndex.of(indexName);
}
