GroupBackend (Gerrit Review Plugin API Documentation)

All Known Implementing Classes:

AbstractGroupBackend, InternalGroupBackend, SystemGroupBackend, UniversalGroupBackend
```
public interface GroupBackend
```
Implementations of GroupBackend provide lookup and membership accessors to a group system.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`GroupDescription.Basic`	`get(AccountGroup.UUID uuid)`	Looks up a group in the backend.
`boolean`	`handles(AccountGroup.UUID uuid)`	Returns `true` if the backend can operate on the UUID.
`default boolean`	`isOrContainsExternalGroup(AccountGroup.UUID groupId)`
`boolean`	`isVisibleToAll(AccountGroup.UUID uuid)`	Returns `true` if the group with the given UUID is visible to all registered users.
`GroupMembership`	`membershipsOf(CurrentUser user)`	Returns the group membership checker for the backend.
`Collection<GroupReference>`	`suggest(String name, ProjectState project)`	Returns suggestions for the group name sorted by name.

- Method Detail
  - handles
```
boolean handles(AccountGroup.UUID uuid)
```
    Returns true if the backend can operate on the UUID.
  - get
```
GroupDescription.Basic get(AccountGroup.UUID uuid)
```
    Looks up a group in the backend. If the group does not exist, null is returned.
    
    Parameters:
    
    uuid - the group identifier
    
    Returns:
    
    the group
  - suggest
```
Collection<GroupReference> suggest(String name,
                                   ProjectState project)
```
    Returns suggestions for the group name sorted by name.
  - membershipsOf
```
GroupMembership membershipsOf(CurrentUser user)
```
    Returns the group membership checker for the backend.
  - isVisibleToAll
```
boolean isVisibleToAll(AccountGroup.UUID uuid)
```
    Returns true if the group with the given UUID is visible to all registered users.
  - isOrContainsExternalGroup
```
default boolean isOrContainsExternalGroup(AccountGroup.UUID groupId)
```