code: @Override
      public ModifyHostsResult modifyHosts(ModifyHostsRequest request) {
          request = beforeClientExecution(request);
          return executeModifyHosts(request);
      }
docs: <p>
  Modify the auto-placement setting of a Dedicated Host. When auto-placement is enabled, any instances that you
  launch with a tenancy of <code>host</code> but without a specific host ID are placed onto any available Dedicated
  Host in your account that has auto-placement enabled. When auto-placement is disabled, you need to provide a host
  ID to have the instance launch onto a specific host. If no host ID is provided, the instance is launched onto a
  suitable host with auto-placement enabled.
  </p>
  
  @param modifyHostsRequest
  @return Result of the ModifyHosts operation returned by the service.
  @sample AmazonEC2.ModifyHosts
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ec2-2016-11-15/ModifyHosts" target="_top">AWS API
  Documentation</a>