Changes volume level of a participant of an active group call; not supported for live stories. If the current user can
manage the group call or is the owner of the group call, then the participant's volume level will be changed for all
users with the default volume level.
Request type for Tdjson#setGroupCallParticipantVolumeLevel.
Changes volume level of a participant of an active group call; not supported for live stories. If the current user can manage the group call or is the owner of the group call, then the participant's volume level will be changed for all users with the default volume level. Request type for Tdjson#setGroupCallParticipantVolumeLevel.