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+Restore libraries from the serialized payload.
+
+You can use the optional _policy_ argument to provide a policy for handling existing libraries.
+The following policies are allowed:
+
+* **APPEND:** appends the restored libraries to the existing libraries and aborts on collision.
+ This is the default policy.
+* **FLUSH:** deletes all existing libraries before restoring the payload.
+* **REPLACE:** appends the restored libraries to the existing libraries, replacing any existing ones in case of name collisions. Note that this policy doesn't prevent function name collisions, only libraries.
+
+For more information please refer to [Introduction to Redis Functions](/topics/functions-intro).
+
+@return
+
+@simple-string-reply