[Bug] Casting issues.

[Georges1998]

While using the package run into the following error:

Exception in thread "main" java.lang.ClassCastException: class kotlinx.ast.common.ast.DefaultAstNote 
cannot be cast to class kotlinx.ast.common.klass.klassDeclaration (kotlinx.ast.common.ast.DefaultAstNode and
kotlinx.ast.common.klass.klassDeclaration are in unnamed module ..

Need to look into catching and logging the error.