## Code folding

ScriptEditor class has methods getFoldingStructureProvider() and createFoldingActionGroup(). In general, folding structure provider should just implement IFoldingStructureProvider. But if you are using a DLTK AST, you can fetch folding "for free", just by extending AbstractASTFoldingStructureProvider.

Folding actions group can be created like following(FoldingActionGroup is a default DLTK implementation):

    	protected FoldingActionGroup createFoldingActionGroup() {
    		return new FoldingActionGroup(this, getViewer(), RubyUI.getDefault()
    				.getPreferenceStore());
    	}