return SymbolTable::lookupNearestSymbolFrom<func::FuncOp>(*this, flat_sym_ref);
    }
    // TODO(b/204997177): Deprecate and remove.
    func::FuncOp branch_function(int index) { return ResolveBranchFunction(nullptr, index); }

    // Resolve all branch functions.
    // Prefer passing in SymbolTableCollection to reduce lookup costs by