String location

Hi Team,

I am designing a pipeline for oracle DB update . In one part of a development , I was not able to apply " contains" functionality used in string manipulation although I read the document . My requirement is very simple say we have a string DIAB;HYPE , we need to find whether ‘;’ char is present or not using the command $original.Additional_Specialties__c.contains(‘;’) . On validating I get the boolean posted as false irrespective of the string value . Please refer the screenshot below.

-Mapper
-Mapper Validation result

Thanks in advance