CJA Derived Field Lookup() funcion support on schema array field

[#1]

Description - CJA Derived Field Lookup() funcion support on schema array field

Why is this feature important to you - Lookup for array field is a powerful feature for many use cases

How would you like the feature to work - The Lookup() function should be able to take an schema level array field as input, and output an array with lookup names

Current Behaviour - Currently it's not supported. But Lookup() function seems somehow have this functionality as it can take the array field outpt from the Split() function.