How to populate the value of Variable B based on the value of Variable A in a Harness Variable A: The value of Variable A uses <+input> to allow user input. allowedValues restricts the input to predefined options like Option1, Option2, and Option3. Variable B: The value of Variable B is determined dynamically based on the value of Variable A using Harness's expression language. Logic: If Variable A is Option1, then Variable B is set to ValueForOption1. If Variable A is Option2, then Variable B is set to ValueForOption2. If Variable A is Option3, then Variable B is set to ValueForOption3. The else block provides a fallback value if none of the conditions are met.