code: public CreateFleetRequest withLaunchTemplateConfigs(FleetLaunchTemplateConfigRequest... launchTemplateConfigs) {
          if (this.launchTemplateConfigs == null) {
              setLaunchTemplateConfigs(new com.amazonaws.internal.SdkInternalList<FleetLaunchTemplateConfigRequest>(launchTemplateConfigs.length));
          }
          for (FleetLaunchTemplateConfigRequest ele : launchTemplateConfigs) {
              this.launchTemplateConfigs.add(ele);
          }
          return this;
      }
docs: <p>
  The configuration for the EC2 Fleet.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setLaunchTemplateConfigs(java.util.Collection)} or
  {@link #withLaunchTemplateConfigs(java.util.Collection)} if you want to override the existing values.
  </p>
  
  @param launchTemplateConfigs
  The configuration for the EC2 Fleet.
  @return Returns a reference to this object so that method calls can be chained together.