Hey,

I've noticed a TODO in the ParsingUtils class mentioning that the current approach for retrieving the class name of KeyNames when using the merge method could use some improvement.

I believe I've found a solution and created a PR with the changes.

Solution (PR: #366)

The solution involves replacing the regex pattern usage with AST parsing, similar to how we retrieve expressions, and I think the overall consistency of the class has improved. The existing functionality remains unchanged, and all tests have passed, including those in my example project. Additionally, I've added a new test case to ensure everything works with nested KeyNames.