CQL2 can we support propertyName in isInListPredicate?

I hope to do something like this:

'building' IN labels

but according to the CQL2 standard:

isInListPredicate = scalarExpression ["NOT"] "IN" "(" inList ")";
inList = scalarExpression [ {"," scalarExpression} ];
scalarExpression = characterClause                                                                                                                                                                         
                 | numericLiteral
                 | instantInstance
                 | arithmeticExpression
                 | booleanLiteral
                 | propertyName
                 | function;

"‘building' IN labels" is invalid. I can only use array functions:

A_CONTAINEDBY( ('building'), labels)

Which is an overkill approuch.
But I think the array function is complecated. And it is hard to convert to SQL.

So can we support the propertyName in isInListPredicate? something like:

isInListPredicate = scalarExpression ["NOT"] "IN" "(" inList ")"
  | scalarExpression ["NOT"] "IN" propertyName
  | scalarExpression ["NOT"] "IN" function;