referenceUtxos
readonly referenceUtxos!:( utxos: CanResolveToUTxO[] ) => TxBuilderRunner
adds the utxos to the refInputs
field of the resulting Tx
the elements of the array that don't satisfy the IUTxO interface
will be resolved using the provider resolveUtxos method.
returns a reference to the same TxBuilderRunner.