checkRequired function
Checks if the input string is valid.
Implementation
void checkRequired(String fieldName, dynamic fieldValue,
{bool checkEmptyString = true}) {
if (fieldValue == null) {
throw ClientError('missing_required_value',
'$fieldName is a required parameter, cannot be left empty');
}
if (checkEmptyString && fieldValue is String && fieldValue.trim() == '') {
throw ClientError('missing_required_value',
'$fieldName is a required parameter, cannot be left empty');
}
}