code: public void setInstances(java.util.Collection<CreateFleetInstance> instances) {
          if (instances == null) {
              this.instances = null;
              return;
          }
  
          this.instances = new com.amazonaws.internal.SdkInternalList<CreateFleetInstance>(instances);
      }
docs: <p>
  Information about the instances that were launched by the fleet. Valid only when <b>Type</b> is set to
  <code>instant</code>.
  </p>
  
  @param instances
  Information about the instances that were launched by the fleet. Valid only when <b>Type</b> is set to
  <code>instant</code>.