BlocklyXmlHelper Helper class to serialize and deserialize blockly workspaces, including constructing new parsers and serializers as needed. 
ColorUtils Constants and utility functions for handling colors and color strings. 
SimpleArraySet<E> Set-like wrapper around SimpleArrayMap. 
StringOutputStream OutputStream extension that wraps a StringBuffer for use in xml loading and serialization. 


BlockLoadingException Exception thrown when Blockly encounters an error loading blocks.