Indicates that the current set of {@link DeploymentAction deployment actions} comprisea {@link DeploymentSetPlan} and should be applied to a server group.Once this method is invoked, no further actions will be included in the
DeploymentSetPlan.
Any subsequent add, remove, deploy, replace or undeploy builder operations will signal the start of a new DeploymentSetPlan.
@param serverGroupName the name of the server group. Cannot be
null
@return a builder that can continue building the overall deployment plan