code: @Pure
  	public static <T> Iterable<T> filterNull(Iterable<T> unfiltered) {
  		return Iterables.filter(unfiltered, Predicates.notNull());
  	}
docs: Returns a new iterable filtering any null references.
  
  @param unfiltered
  the unfiltered iterable. May not be <code>null</code>.
  @return an unmodifiable iterable containing all elements of the original iterable without any <code>null</code> references. Never <code>null</code>.