@Override
    public Object parse(SourceData sourceData, int rowIndex, Context context) {
        if (numberParser != null) {
            Object valueObj = numberParser.parse(sourceData, rowIndex, context);
            if (valueObj == null) {
                return null;
            }
            BigDecimal numberValue = OperatorTools.parseBigDecimal(valueObj);
            return fibonacci(numberValue.intValue());
        }
        return null;
    }
FibonacciFunction  ->  fibonacci(numeric)
Description:
- Return NULL if 'numeric' is NULL;
- Returns the nth Fibonacci number
inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/arithmetic/FibonacciFunction.java