[        (json array, optional) Warning messages, if any, related to unloading the wallet.
    "str",              (string)
    ...
  ]
}

Examples:
> bitcoin-cli unloadwallet wallet_name
> curl --user myusername --data-binary '{"jsonrpc": "1.0", "id": "curltest", "method": "unloadwallet", "params": [wallet_name]}' -H 'content-type: text/plain;' http://127.0.0.1:8332/


