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How to use the IS_SUBTR operation for Computed Attributes
The IS_SUBSTR operation tests if a string is in a particular text.
IS_SUBSTR(‘World, ‘Hello World’)
IS_SUBSTR(substring, text_to_search, [starting_at])
substring - The string to verify if it is a substring of text_to_search
text_to_search - The text to search for the first occurrence of substring
starting_at - [ OPTIONAL - 1 by default ] - The character within text_to_search at which to start the search.