Issue on approval workflow when checking for a specific role

Summary:

I need to send a workflow by checking if a role exists, and then add then add the opposite statement

Content (required):

i understand i can use

Requestor's Role Details.dataRole Contains "Role1"

but how to put the opposite line in

Is there a 'Not Contains' or 'Not In'

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):