{"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"assoc_resolutions:"}]}
    assoc_resolutions: FxHashMap<ExprOrPatId, (AssocItemId, Substitution)>,
    /// For each associated item record what it resolves to
    /// Whenever a tuple field expression access a tuple field, we allocate a tuple id in