boolean isDefinedInEnv() {
    if (envVars == null || paramNames.length == 0) {
      return false;
    }
    for (String var : envVars) {
      if (System.getenv(var) == null) {
        return false;
      }
    }
    return true;
  }
Determines if the argument provisioning has been done via the environment.
extensions/geode-modules-session/src/main/java/org/apache/geode/modules/session/installer/args/Argument.java