private static boolean checkRange(int base) {
        return Math.abs(base) >= 2 && Math.abs(base) <= 36;
    }
Converts a number from one base to another.

@param number   The number to be converted (as a string or integer).
@param fromBase The base of the input number.
@param toBase   The base to which the number should be converted.
@return The converted number as a string, or null if input is invalid.
inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/arithmetic/RadixConvertFunction.java