diff --git a/src/runner/instance.rs b/src/runner/instance.rs
index 0668e38..2e748ca 100644
--- a/src/runner/instance.rs
+++ b/src/runner/instance.rs
@@ -338,6 +338,7 @@ macro_rules! cf{
 	};
 }
 type FPointer=fn(&mlua::Lua,mlua::MultiValue)->mlua::Result<mlua::MultiValue>;
+// TODO: use macros to define these with better organization
 /// A double hash map of function pointers.
 /// The class tree is walked by the Instance.__index metamethod to find available class methods.
 static CLASS_FUNCTION_DATABASE:phf::Map<&str,phf::Map<&str,FPointer>>=phf::phf_map!{