private boolean isSameType(Object a, Object b) {
        return (a instanceof String && b instanceof String) || (a instanceof byte[] && b instanceof byte[]);
    }
StartsWithFunction  ->  startswith(s1,s2)
description:
- Return NULL if either argument is NULL;
- Return whether 's2' starts with 's2'.
inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/string/StartsWithFunction.java