always returns null . concode_field_sep History NO_HISTORY concode_field_sep Statistics[] getStats concode_elem_sep Statistics[] getStats concode_elem_sep DateTime getEndTime concode_elem_sep DateTime getEndTime concode_elem_sep Window getWindow concode_elem_sep Window getWindow concode_elem_sep long getTotalDuration concode_elem_sep long getTotalDuration
DateTime function ( ) { return null ; }