code: protected boolean isValidFeatureCallArgument(XExpression expression, JvmIdentifiableElement linkedReceiver, IFeatureScopeSession session) {
  		if (linkedReceiver instanceof JvmType) {
  			IEObjectDescription knownSuperType = session.getLocalElement(SUPER);
  			if (knownSuperType != null && linkedReceiver == knownSuperType.getEObjectOrProxy()) {
  				return false;
  			}
  		}
  		return !(expression instanceof XAbstractFeatureCall) || linkedReceiver != null && !linkedReceiver.eIsProxy();
  	}
docs: Returns <code>true</code> if the linked receiver may be passed as an argument. Basically everything could
  be passed as an argument except the linked receiver is null, a proxy or a reference to <code>super</code>.