toMap method
Implementation
@override
Map<String, dynamic> toMap(){
return {
if(code != null) 'code': code,
if(name != null) 'name': name,
if(disabled != null) 'disabled': disabled,
if(description != null) 'description': description,
if(photoURL != null) 'photoURL': photoURL,
if(quantity != null) 'quantity': quantity,
if(discountRate != null) 'discountRate': discountRate,
if(measureId != null) 'measureId': measureId,
if(reference != null) 'reference': reference,
if(price != null) 'price': price,
};
}