code: public static final <K, V> PropertiesIterator<K, V> newPropertiesIterator( String keyPrefix, Map<K, V> properties )
  	{
  		return new PropertiesIterator<K, V>(keyPrefix, properties);
  	}
docs: Creates a new iterator over a map configuration with prefixing the keys with the given prefix.
  
  @param <K> the map entry key type.
  @param <V> the map entry value type.
  @param keyPrefix the prefix for key entries.
  @param properties the map configuration has to be read.
  @return a map configuration iterator.