Importing Jars in Katalon Studio

I am not able to import jars in the studio, while already having added the jars to the external jar feature, when i try to import the classes/ jars to the testcase/ keyword (.groovy) files, it gives error. Please help with the same.

add your .jar(s) to the Driver folder
restart Katalon Studio -> will download class-path’s

import package.classname.method

create object

MyClass object = new MyClass()
object.method()