## Fixed type for resolver

PR Summary

Updated Type Declaration for $resolver Property

The type specification for a significant piece of code referred to as $resolver has been revised. Previously, it was strictly set to be Closure, which is a specific kind of function used in programming. However, the update has extended this to callable|Closure, meaning that $resolver can now be a general callable function or a Closure. This change increases flexibility, potentially allowing for more diverse functions to be used for $resolver, thus enhancing the versatility of the software.