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<b>Warning</b>:  session_start(): open(/var/lib/php/sessions/sess_uusfk1pvv4s3ujg7sn3dgadp00, O_RDWR) failed: No space left on device (28) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
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<b>Warning</b>:  session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
asclass VarContext {
  gettable VarContext parent;

  *() {}
  *(VarContext *parent) {}
  
  abstract O get(S name);
  
  abstract void set aka put(S name, O value);

  abstract AutoCloseable tempSet aka tempPut(S name, O value);
  
  // either undefines variable completely or just sets variable to null
  abstract void unset(S name);
  
  abstract MapSO varMap();
  
  void printMe {
    pnl(varMap());
    print(+parent);
  }
  
  // mechanism for returning from a script
  
  settable O exitFromScript;
  settable O returnValue;
  bool exiting() { ping(); ret exitFromScript != null; }
}