using positional arguments
> bitcoin-cli sendall '["bc1q09vm5lfy0j5reeulh4x5752q25uqqvz34hufdl"]' null "unset" 1.1

Spend all UTXOs split into equal amounts to two addresses with a fee rate of 1.5 sat/vB using the options argument
> bitcoin-cli sendall '["bc1q09vm5lfy0j5reeulh4x5752q25uqqvz34hufdl", "bc1q02ad21edsxd23d32dfgqqsz4vv4nmtfzuklhy3"]' null "unset" null '{"fee_rate": 1.5}'

Leave dust UTXOs in wallet, spend only UTXOs with positive effective value with a fee rate of 10 sat/vB using the options arg