An opaque type that represents continuation key for
deleteRange. It is used to perform an operation across
multiple calls to this method (such as in a loop until continuation
key becomes null). This is an opaque type from application perspective
and only values from previous results should be used.
An opaque type that represents continuation key for deleteRange. It is used to perform an operation across multiple calls to this method (such as in a loop until continuation key becomes null). This is an opaque type from application perspective and only values from previous results should be used.