Code structure refactor.

src/fn_register.rs

@@ -2,10 +2,10 @@
 
 #![allow(non_snake_case)]
 
+use crate::ast::FnAccess;
 use crate::dynamic::{Dynamic, DynamicWriteLock, Variant};
 use crate::engine::Engine;
 use crate::fn_native::{CallableFunction, FnAny, FnCallArgs, NativeCallContext, SendSync};
-use crate::parser::FnAccess;
 use crate::r#unsafe::unsafe_cast_box;
 use crate::result::EvalAltResult;
 use crate::utils::ImmutableString;