code: public final double getDoubleDefault(double defaultValue, String attribute, String... path)
      {
          try
          {
              return Double.parseDouble(getNodeStringDefault(String.valueOf(defaultValue), attribute, path));
          }
          catch (final NumberFormatException exception)
          {
              throw new LionEngineException(exception, media);
          }
      }
docs: Get a double in the xml tree.
  
  @param defaultValue Value used if node does not exist.
  @param attribute The attribute to get as double.
  @param path The node path (child list)
  @return The double value.
  @throws LionEngineException If unable to read node.