Create an index and associate it with the corresponding extractor.

Important: it is a responsibility of this method's implementations to place the necessary <IValueExtractor, ICacheEntry> entry into the given map of indexes.

Destroy an existing index and remove it from the given dictionary of indexes.

Compare the IValueExtractor with another object to determine equality.

Extract the value from the passed object.

Determine a hash value for the IValueExtractor object according to the general object.GetHashCode contract.

Provide a human-readable description of this IValueExtractor object.