There's no documentation for these Javascript types in the api documentation at http://fusion360.autodesk.com/resources - the page returns something like:
Not Found
The requested URL /cloudhelp/ENU/Fusion-360-API/files/SketchTexts.htm was not found on this server.
class SketchTexts
class EventHandler
class DataItem
class PathPatternFeatures
class Scripts
class TSplineBody
