code: public java.util.List<OperatingSystemConfigurationManager> getConfigurationManagers() {
          if (configurationManagers == null) {
              configurationManagers = new com.amazonaws.internal.SdkInternalList<OperatingSystemConfigurationManager>();
          }
          return configurationManagers;
      }
docs: <p>
  Supported configuration manager name and versions for an AWS OpsWorks Stacks operating system.
  </p>
  
  @return Supported configuration manager name and versions for an AWS OpsWorks Stacks operating system.