Review

class Document {
  /**
   * <p>Removes all fields with the given name from the document.
   * If there is no field with the specified name, the document remains unchanged.</p>
   * <p> Note that the removeField(s) methods like the add method only make sense 
   * prior to adding a document to an index. These methods cannot
   * be used to change the content of an existing index! In order to achieve this,
   * a document has to be deleted from an index and a new changed version of that
   * document has to be added.</p>
   */
  public final void removeFields(String name) {
    Iterator it = fields.iterator();
    while (it.hasNext()) {
      Fieldable field = (Fieldable)it.next();
      if (field.name().equals(name)) {
        it.remove();
      }
    }
  }

}