a #TpBaseClient instance
a #TpAccount with %TP_ACCOUNT_FEATURE_CORE, and any other features added via tp_base_client_add_account_features() or tp_simple_client_factory_add_account_features(), prepared if possible
a #TpConnection with %TP_CONNECTION_FEATURE_CORE, and any other features added via tp_base_client_add_connection_features(), or tp_simple_client_factory_add_connection_features(), prepared if possible
a #GList of #TpChannel, each with %TP_CHANNEL_FEATURE_CORE, and any other features added via tp_base_client_add_channel_features() or tp_simple_client_factory_add_channel_features(), prepared if possible
a #TpChannelDispatchOperation or %NULL; the dispatch_operation is not guaranteed to be prepared
a #GList of #TpChannelRequest having their object-path defined but are not guaranteed to be prepared.
a #TpObserveChannelsContext representing the context of this D-Bus call
Signature of the implementation of the ObserveChannels method.
This function must call either tp_observe_channels_context_accept(), tp_observe_channels_context_delay() or tp_observe_channels_context_fail() on
context
before it returns.