Our Client system is upgraded to UI5 Version 1.20
But if I want to use some of the functionalities like MessageBox which are available from 1.21.2. Can we use that?
In Index.html File --> I am mentioning like below to get the updated libraries
but i am not able to Use MessageBox functionalities and getting MessageBox.error() is not a function etc etc
will it really work ? will it really include latest libraries if i use src as below .