code: @Override
  	public boolean satisfies(Match match, int... ind)
  	{
  		assert ind.length == 2;
  
  		return (match.get(ind[0]) == match.get(ind[1])) == equals;
  	}
docs: Checks if the two elements are identical or not identical as desired.
  @param match current pattern match
  @param ind mapped indices
  @return true if identity checks equals the desired value