54     for (const auto& handler : handlers_->on_signaling_change)  in OnSignalingChange()  local
59     for (const auto& handler : handlers_->on_data_channel)  in OnDataChannel()  local
63     for (const auto& handler : handlers_->on_renegotiation_needed)  in OnRenegotiationNeeded()  local
68     for (const auto& handler : handlers_->on_standardized_ice_connection_change)  in OnStandardizedIceConnectionChange()  local
73     for (const auto& handler : handlers_->on_connection_change)  in OnConnectionChange()  local
78     for (const auto& handler : handlers_->on_ice_gathering_change)  in OnIceGatheringChange()  local
82     for (const auto& handler : handlers_->on_ice_candidate)  in OnIceCandidate()  local
90     for (const auto& handler : handlers_->on_ice_candidate_error)  in OnIceCandidateError()  local
95     for (const auto& handler : handlers_->on_ice_candidates_removed)  in OnIceCandidatesRemoved()  local
101     for (const auto& handler : handlers_->on_add_track)  in OnAddTrack()  local
106     for (const auto& handler : handlers_->on_track)  in OnTrack()  local
111     for (const auto& handler : handlers_->on_remove_track)  in OnRemoveTrack()  local