Method comparator

src/main/java/gate/util/RBTreeMap.java:270–273

Returns the comparator used to order this map, or null if this map uses its keys' natural order. @return the comparator associated with this sorted map, or null if it uses its keys' natural sort method.

()

    * 	       <tt>null</tt> if it uses its keys' natural sort method.
    */
  @Override
  public Comparator<? super K> comparator() {
      return comparator;
  }

  /**
    * Returns the first (lowest) key currently in this sorted map.