WithdrawAsset constructor Null safety
Implementation
WithdrawAsset(this.enabled, this.authenticationRequired, this.feeFixed, this.feePercent,
this.minAmount, this.maxAmount, this.types);
WithdrawAsset(this.enabled, this.authenticationRequired, this.feeFixed, this.feePercent,
this.minAmount, this.maxAmount, this.types);