This is the active client.

No client is active.

Other client is active.

Native app.

Web app (not used anymore?).

Hangouts app for Android.

Hangouts Chrome extension.

Hangouts app for iOS.

Hangouts Chrome app ("ultraviolet").

Hangouts web interface in Gmail.

Hangouts web interface in Google Plus.

Hangouts web app (https://hangouts.google.com).

User is participating in conversation.

User is invited to conversation.

User has left conversation.

Conversation is group (any number of participants).

Conversation is one-to-one (only 2 participants).

Conversation has been archived.

Conversation is in inbox.

Google Map place.

Google Plus photo.

Notifications are disabled.

Notifications are enabled.

Conversation is off-the-record (history disabled).

Conversation is on-the-record (history enabled).

URL is a placeholder.

URL is a photo set by the user.

Segment is a line break.

Segment is hyperlinked text.

Segment is text.

Stopped typing with inputted text.

Started typing.

Stopped typing with no inputted text.

Enum value maps for ActiveClientState.

Enum value maps for ActiveClientState.

Enum value maps for BlockState.

Enum value maps for BlockState.

Enum value maps for CallerIdSettingsMask.

Enum value maps for CallerIdSettingsMask.

Enum value maps for ClientBuildType.

Enum value maps for ClientBuildType.

Enum value maps for ClientId.

Enum value maps for ClientId.

Enum value maps for ClientPresenceStateType.

Enum value maps for ClientPresenceStateType.

Enum value maps for ConfigurationBitType.

Enum value maps for ConfigurationBitType.

Enum value maps for ConversationStatus.

Enum value maps for ConversationStatus.

Enum value maps for ConversationType.

Enum value maps for ConversationType.

Enum value maps for ConversationView.

Enum value maps for ConversationView.

Enum value maps for DeleteType.

Enum value maps for DeleteType.

Enum value maps for DeliveryMediumType.

Enum value maps for DeliveryMediumType.

Enum value maps for EMItemType.

Enum value maps for EMItemType.

Enum value maps for EMPlusPhoto_PhotoMediaType.

Enum value maps for EMPlusPhoto_PhotoMediaType.

Enum value maps for Entity_PastHangoutState.

Enum value maps for Entity_PastHangoutState.

Enum value maps for EventType.

Enum value maps for EventType.

Enum value maps for FieldMask.

Enum value maps for FieldMask.

Enum value maps for FocusDevice.

Enum value maps for FocusDevice.

Enum value maps for FocusType.

Enum value maps for FocusType.

Enum value maps for ForceHistory.

Enum value maps for ForceHistory.

Enum value maps for Gender.

Enum value maps for Gender.

Enum value maps for GroupLinkSharingStatus.

Enum value maps for GroupLinkSharingStatus.

Enum value maps for HangoutEventType.

Enum value maps for HangoutEventType.

Enum value maps for InvitationAffinity.

Enum value maps for InvitationAffinity.

Enum value maps for InvitationStatus.

Enum value maps for InvitationStatus.

Enum value maps for ItemType.

Enum value maps for ItemType.

Enum value maps for MembershipChangeType.

Enum value maps for MembershipChangeType.

Enum value maps for NetworkType.

Enum value maps for NetworkType.

Enum value maps for NotificationLevel.

Enum value maps for NotificationLevel.

Enum value maps for OffnetworkAddressType.

Enum value maps for OffnetworkAddressType.

Enum value maps for OffTheRecordStatus.

Enum value maps for OffTheRecordStatus.

Enum value maps for OffTheRecordToggle.

Enum value maps for OffTheRecordToggle.

Enum value maps for ParticipantType.

Enum value maps for ParticipantType.

Enum value maps for PhoneDiscoverabilityStatus.

Enum value maps for PhoneDiscoverabilityStatus.

Enum value maps for PhoneValidationResult.

Enum value maps for PhoneValidationResult.

Enum value maps for PhoneVerificationStatus.

Enum value maps for PhoneVerificationStatus.

Enum value maps for PhotoUrlStatus.

Enum value maps for PhotoUrlStatus.

Enum value maps for ProfileType.

Enum value maps for ProfileType.

Enum value maps for ReplyToInviteType.

Enum value maps for ReplyToInviteType.

Enum value maps for ResponseStatus.

Enum value maps for ResponseStatus.

Enum value maps for RichPresenceType.

Enum value maps for RichPresenceType.

Enum value maps for SegmentType.

Enum value maps for SegmentType.

Enum value maps for SoundState.

Enum value maps for SoundState.

Enum value maps for SourceType.

Enum value maps for SourceType.

Enum value maps for SyncFilter.

Enum value maps for SyncFilter.

Enum value maps for TypingType.

Enum value maps for TypingType.

An attachment for a chat message.

List of StateUpdate messages to allow pushing multiple notifications from the server to the client simultaneously.

A chat message in a conversation.

The client and device version.

A conversation between two or more users.

Identifies a conversation.

State of a conversation and recent events.

Describes a user's country.

Sound settings in the desktop Hangouts client.

Indicates whether Hangouts is active (running in the foreground) on different types of devices.

Enable or disable do-not-disturb mode.

The state of do-not-disturb mode.

A user that can participate in conversations.

Specifies an entity to lookup by one of its properties.

Event that becomes part of a conversation's history.

Annotation that can be applied to a chat message event.

Token that allows retrieving more events from a position in a conversation.

Chat message content.

The user's mood message.

Identifies a user.

Header for requests from the client to the server.

Header for responses from the server to the client.

A segment of a message.

Notifies the status of other clients and mood.

Allows setting one or more of the included presence-related settings.

Pushed from the server to the client to notify it of state changes.

Header for StateUpdate messages.

Describes which Hangouts client is active.

Build type of the client.

Identifies the client.

A type of binary configuration option.

A type of embedded item.

Whether the OTR toggle is available to the user.

Status of EntityProperties.photo_url.

Status of the response from the server to the client.