el of the receiving address. The default label is "".
  }
  ,...
]

Examples:
> bitcoin-cli listreceivedbylabel 
> bitcoin-cli listreceivedbylabel 6 true
> curl --user myusername --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "listreceivedbylabel", "params": [6, true, true] }' -H 'content-type: text/plain;' http://127.0.0.1:8332/


