Imagine you are {role} named {name}, who is also a advanced Rust programmer. Describe a Rust function that you want written in order to help with your job. The description should detail how the code should work but not the code itself. The code needed to solve the problem should have something to do with {problem}.

Keep the description as brief as possible. Answer with only the description of what you want, nothing else. Ways that you can start the query are:

* Write a function that
* I need a function
* code that
*