wellknown.HTTPInspector:               "envoy.listener.http_inspector",
		wellknown.OriginalDestination:         "envoy.listener.original_dst",
		"envoy.filters.listener.original_src": "envoy.listener.original_src",
		wellknown.ProxyProtocol:               "envoy.listener.proxy_protocol",
		wellknown.TLSInspector:                "envoy.listener.tls_inspector",
		wellknown.ClientSSLAuth:               "envoy.client_ssl_auth",

	// HTTPInspector listener filter
	HTTPInspector = "envoy.filters.listener.http_inspector"
	// OriginalSource listener filter
	OriginalSource = "envoy.filters.listener.original_src"
)

// Access log sink names
const (
	// FileAccessLog sink name
	FileAccessLog = "envoy.access_loggers.file"
	// HTTPGRPCAccessLog sink for the HTTP gRPC access log service

    auto inserted = unique_bound_inputs.insert(std::make_pair(attr, i));
    if (inserted.second) continue;
    auto duplicate_arg = func.getArgument(i);
    auto original_arg = func.getArgument(unique_bound_inputs[attr]);
    duplicate_arg.replaceAllUsesWith(original_arg);
    arg_indices_to_erase.set(i);
  }
  func.eraseArguments(arg_indices_to_erase);
}

}  // namespace

std::unique_ptr<OperationPass<func::FuncOp>>