(1) Using a complex property -> 

(element is an Integer , element is a String)

-> Add tosca function to string -> saves ok
-> Add a value to integer manually -> click save -> error about invalid content displayed (Invalid property values provided: Unsupported value provided for string property supported value type is integer.)
    -> no way to fix issue now , as selecting a value for string via stringbuilder or direct entry will result in an error displayed

Issue seems to be triggered by the standard Save button 

(2) Using a List of complex types , List<complex>

a - child properties which are complex 
        -> Check the box and open stringbuilder -> select value and save -> the field is greyed out but no value added
        -> Adding a simple value directly (no stringbuilder) - it saves and is displayed ok

b - sub property is a list , [complex]
        -> add simple value - saves ok
        -> replace this with a stringbuilder value - saves ok -> Blank field shown / no value
        -> delete the entry
        -> Save -> Error - Invalid content
        
c - child property is a map
        -> no checkbox available to use the stringbuilder

        -> click add value -> the key is populated with "0"  , add a string value -> Save -> Error invalid content 
            -> remove the entry and saves ok
        > Add a new value -> a,a  > saves ok
        > Add a new value -> 0,a  > saves ok - accepting the integer in key now