convertDouble method
Implementation
String convertDouble(double? number) {
if (number == null) return '' ;
int firstNumber = int.parse(number.toString().split('.')[0]);
int secondNumber = int.parse(number.toString().split('.')[1]);
String numberInCharecters;
numberInCharecters = getTextForNumber(firstNumber);
numberInCharecters += (secondNumber==0? "":" ${_numberMappings.mappings[999999999]} ${getTextForNumber(secondNumber)}" );
return numberInCharecters;
}