Function type_id_function_ptr 

pub const fn type_id_function_ptr(_type_id: TypeId) -> Option<FnPtr>

🔬This is a nightly-only experimental API. (core_intrinsics)

Given a TypeId that represents a function pointer returns an core::mem::type_info::FnPtr. When called on something else this returns None.

The more user-friendly version of this intrinsic is core::any::TypeId::function_ptr.