void function ( ) { this . popCurrentStep ( true ) ; }
remove the last stored position and make that the current position within this match context . concode_field_sep Stack<Integer> _savedPositions concode_elem_sep Pattern spaces concode_elem_sep int _currentIndex concode_elem_sep String[] _steps concode_field_sep void backup concode_elem_sep String getCurrentStep concode_elem_sep int getLength concode_elem_sep void pushCurrentStep concode_elem_sep String toString concode_elem_sep boolean canAdvance concode_elem_sep void advance