Conversion constructor
Conversion({})
Implementation
Conversion({
required this.id,
this.settlementDate,
this.conversionDate,
this.createdAt,
this.updatedAt,
this.status,
this.buyCurrency,
this.sellCurrency,
this.clientBuyAmount,
this.clientSellAmount,
this.fixedSide,
this.coreRate,
});