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The important part is to not to do any tightly bound static typecasting. It uses Any concept with List in Scala to achieve this.

Scripts Overview:

(1) convertKg2lbs.scala - This file has methods convert_list_to_k(List[Any]), which takes list of any type. This file is found inside src/main/scala.

(2) We basically give two type if inputs to convert_list_to_k, and one is list of weights and other is list of person object. Each person object can have a pair of name and weight (in kgs).

Unit Testing:

Unit Testing is done by script convertSpec.scala. This file is located in src/main/test. It uses ScalaTest framework to test the two input cases discussed in point (2) above.

How to run:

(1) This project can be opened using IntelliJ IDE or similar.

(2) Run the sbt to get the dependencies before you run convertKg2lbs.scala or convertSpec.scala.