Macro define_dep_nodes 

macro_rules! define_dep_nodes {
    (
        queries {
            $(
                $(#[$q_attr:meta])*
                fn $q_name:ident($K:ty) -> $V:ty
                // Search for (QMODLIST) to find all occurrences of this query modifier list.
                // Query modifiers are currently not used here, so skip the whole list.
                { $($modifiers:tt)* }
            )*
        }
        non_queries {
            $(
                $(#[$nq_attr:meta])*
                $nq_name:ident,
            )*
        }
    ) => { ... };
}