text: //
  //  RTCVideoTrack+MetaData.h
  //  Pods
  //
  //  Created by gaoxiupei on 2017/5/24.
  //
  //
  
  #import "RTCVideoTrack.h"
  
  @interface RTCVideoTrack (MetaData)
  @property(nonatomic, copy)NSString *belong;
  @end
  