Move more packages to plugins.

src/packages/fn_basic.rs

@@ -1,9 +1,16 @@
 use crate::def_package;
+use crate::engine::make_getter;
 use crate::fn_native::FnPtr;
+use crate::plugin::*;
+
+#[export_fn]
+fn get_fn_name(f: &mut FnPtr) -> ImmutableString {
+    f.get_fn_name().clone()
+}
 
 def_package!(crate:BasicFnPackage:"Basic Fn functions.", lib, {
-    lib.set_fn_1_mut("name", |f: &mut FnPtr| Ok(f.get_fn_name().clone()));
+    set_exported_fn!(lib, "name", get_fn_name);
 
     #[cfg(not(feature = "no_object"))]
-    lib.set_getter_fn("name", |f: &mut FnPtr| Ok(f.get_fn_name().clone()));
+    set_exported_fn!(lib, make_getter("name"), get_fn_name);
 });