public Map<String, SystemAdmin> getSystemAdmins(String adminLabel) {
    if (systemAdminMap.isEmpty()) {
      systemAdminMap = getSystemFactories().entrySet()
          .stream()
          .collect(Collectors.toMap(Entry::getKey,
            systemNameToFactoryEntry -> systemNameToFactoryEntry.getValue()
               .getAdmin(systemNameToFactoryEntry.getKey(), this, adminLabel)));
    }
    return systemAdminMap;
  }
Get {@link SystemAdmin} instances for all the systems defined in this config.

@return map of system name to {@link SystemAdmin}
samza-core/src/main/java/org/apache/samza/config/SystemConfig.java