title: DJI M210 ，can not alloca bandwidth
body: <p>I am using Mobile SDK to develop a M210 special  app。 
  When I try to alloc aircraft bandwidth using the following code ：</p>
  
  <pre><code> DJIAirLink * airlink= [DemoComponentHelper fetchAirLink];
  [airlink.lightbridgeLink setBandwidthAllocationForMainCamera:1.0 withCompletion:^(NSError * _Nullable error) {
          if(error){
              NSLog(@"%@",error);}];
   [ airlink.lightbridgeLink setBandwidthAllocationForLeftCamera:0.7 withCompletion:^(NSError * _Nullable error) {
                  if(error){
                      NSLog(@"%@",error);
                  }];
  </code></pre>
  
  <p>I get a error:Current product does not support this feature.(code:-1013)</p>
  
  <p>Can anybody explain this error ？ thanks</p>