How to use

checkNull

method

in

org.robovm.apple.foundation.NSMutableArray

private Object set0(int index, NSObject element) {
  checkNull(element);
  checkIndex(index);
  Object old = getObjectAt(index);
  replaceObject(index, element);
  if(old instanceof NSString) {
    old = old.toString();
  } else if(old instanceof NSNumber) {
    old = Double.valueOf(((NSNumber)old).doubleValue());
  }
  return old;
}

private Object set0(int index, NSObject element) {
  checkNull(element);
  checkIndex(index);
  Object old = getObjectAt(index);
  replaceObject(index, element);
  if(old instanceof NSString) {
    old = old.toString();
  } else if(old instanceof NSNumber) {
    old = Double.valueOf(((NSNumber)old).doubleValue());
  }
  return old;
}

public Object set(int index, boolean element) {
  checkNull(Boolean.valueOf(element));
  checkIndex(index);
  Object old = getObjectAt(index);
  replaceObject(index, NSNumber.valueOf(element));
  if (old instanceof NSNumber) {
    old = Boolean.valueOf(((NSNumber)old).booleanValue());
  }
  return old;
}

public Object set(int index, boolean element) {
  checkNull(Boolean.valueOf(element));
  checkIndex(index);
  Object old = getObjectAt(index);
  replaceObject(index, NSNumber.valueOf(element));
  if (old instanceof NSNumber) {
    old = Boolean.valueOf(((NSNumber)old).booleanValue());
  }
  return old;
}

private void add0(int index, NSObject element) {
  checkNull(element);
  if (index < 0 || index > getCount()) {
    checkIndex(index);
  }
  if(element == null) {
    element = NSNull.getNull();
  }
  insertObject((NSObject)element, index);
}

private void add0(int index, NSObject element) {
  checkNull(element);
  if (index < 0 || index > getCount()) {
    checkIndex(index);
  }
  if(element == null) {
    element = NSNull.getNull();
  }
  insertObject((NSObject)element, index);
}