成员的完整列表，这些成员属于 com.netease.nimlib.sdk.v2.conversation.V2NIMConversationGroupService,包括所有继承而来的类成员

addConversationGroupListener(@NonNull V2NIMConversationGroupListener listener)	com.netease.nimlib.sdk.v2.conversation.V2NIMConversationGroupService
addConversationsToGroup(@NonNull String groupId,@NonNull List< String > conversationIds, V2NIMSuccessCallback< List< V2NIMConversationOperationResult >> success, V2NIMFailureCallback failure)	com.netease.nimlib.sdk.v2.conversation.V2NIMConversationGroupService
createConversationGroup(@NonNull String name, String serverExtension, List< String > conversationIds, V2NIMSuccessCallback< V2NIMConversationGroupResult > success, V2NIMFailureCallback failure)	com.netease.nimlib.sdk.v2.conversation.V2NIMConversationGroupService
deleteConversationGroup(@NonNull String groupId, V2NIMSuccessCallback< Void > success, V2NIMFailureCallback failure)	com.netease.nimlib.sdk.v2.conversation.V2NIMConversationGroupService
getConversationGroup(@NonNull String groupId, V2NIMSuccessCallback< V2NIMConversationGroup > success, V2NIMFailureCallback failure)	com.netease.nimlib.sdk.v2.conversation.V2NIMConversationGroupService
getConversationGroupList(V2NIMSuccessCallback< List< V2NIMConversationGroup >> success, V2NIMFailureCallback failure)	com.netease.nimlib.sdk.v2.conversation.V2NIMConversationGroupService
getConversationGroupListByIds(@NonNull List< String > groupIds, V2NIMSuccessCallback< List< V2NIMConversationGroup >> success, V2NIMFailureCallback failure)	com.netease.nimlib.sdk.v2.conversation.V2NIMConversationGroupService
removeConversationGroupListener(@NonNull V2NIMConversationGroupListener listener)	com.netease.nimlib.sdk.v2.conversation.V2NIMConversationGroupService
removeConversationsFromGroup(@NonNull String groupId,@NonNull List< String > conversationIds, V2NIMSuccessCallback< List< V2NIMConversationOperationResult >> success, V2NIMFailureCallback failure)	com.netease.nimlib.sdk.v2.conversation.V2NIMConversationGroupService
updateConversationGroup(@NonNull String groupId, String name, String serverExtension, V2NIMSuccessCallback< Void > success, V2NIMFailureCallback failure)	com.netease.nimlib.sdk.v2.conversation.V2NIMConversationGroupService