SubmitTransactionResponse constructor Null safety
Implementation
SubmitTransactionResponse(this.extras, this.ledger, this.hash,
this.strEnvelopeXdr, this.strResultXdr, this.strMetaXdr);
SubmitTransactionResponse(this.extras, this.ledger, this.hash,
this.strEnvelopeXdr, this.strResultXdr, this.strMetaXdr);