<commit_before>#ifndef __ZOOKEEPER_GROUP_HPP__
#define __ZOOKEEPER_GROUP_HPP__

#include <map>
#include <set>
#include <string>

#include "process/future.hpp"
#include "process/timer.hpp"

#include <stout/check.hpp>
#include <stout/duration.hpp>
#include <stout/none.hpp>
#include <stout/option.hpp>
#include <stout/try.hpp>

#include "zookeeper/authentication.hpp"
#include "zookeeper/url.hpp"

// Forward declarations.
class Watcher;
class ZooKeeper;

namespace zookeeper {

// Forward declaration.
class GroupProcess;

// Represents a distributed group managed by ZooKeeper. A group is
// associated with a specific ZooKeeper path, and members are
// represented by ephemeral sequential nodes.
class Group
{
public:
  // Represents a group membership. Note that we order memberships by<commit_msg>Fixed missing process.hpp include in zookeeper group.<commit_after>#ifndef __ZOOKEEPER_GROUP_HPP__
#define __ZOOKEEPER_GROUP_HPP__

#include <map>
#include <set>
#include <string>

#include "process/future.hpp"
#include "process/timer.hpp"
#include "process/process.hpp"

#include <stout/check.hpp>
#include <stout/duration.hpp>
#include <stout/none.hpp>
#include <stout/option.hpp>
#include <stout/try.hpp>

#include "zookeeper/authentication.hpp"
#include "zookeeper/url.hpp"

// Forward declarations.
class Watcher;
class ZooKeeper;

namespace zookeeper {

// Forward declaration.
class GroupProcess;

// Represents a distributed group managed by ZooKeeper. A group is
// associated with a specific ZooKeeper path, and members are
// represented by ephemeral sequential nodes.
class Group
{
public:
  // Represents a group membership. Note that we order memberships by
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