The type constructor into which a result of each command is wrapped.
Executes PFADD
NOTE: elements
CAN be empty, Redis accepts it
Executes PFADD
Executes PFCOUNT
or simply returns 0 when keys
is empty, without sending the command to Redis
Executes PFCOUNT
Executes PFMERGE.
Executes PFMERGE.
NOTE: sourcekeys
CAN be empty, Redis accepts it
Executes PFMERGE