public void add(int start, int end, EMItem item) { add(start, end, item, null, null, null, null);
public boolean add(int start, int end, EMItem item) { return add(start, end, item, null, null, null, null);
  public void add(int start, int end, EMItem item) {    add(start, end, item, null, null, null, null);  }