_t = __t1943;
_t = __t1949;
	public final void hidestate(AST _t) throws RecognitionException {				AST hidestate_AST_in = (_t == ASTNULL) ? null : (AST)_t;				AST __t1943 = _t;		AST tmp1991_AST_in = (AST)_t;		match(_t,HIDE);		_t = _t.getFirstChild();		{		if (_t==null) _t=ASTNULL;		switch ( _t.getType()) {		case STREAM:		{			stream_name(_t);			_t = _retTree;			break;		}		case EOF:		case PERIOD:		case ALL:		case IN_KW:		case MESSAGE:		case NOPAUSE:		case Widget_ref:		{			break;		}		default:		{			throw new NoViableAltException(_t);		}		}		}		{		if (_t==null) _t=ASTNULL;		switch ( _t.getType()) {		case MESSAGE:		{			AST tmp1992_AST_in = (AST)_t;			match(_t,MESSAGE);			_t = _t.getNextSibling();			break;		}		case ALL:		{			AST tmp1993_AST_in = (AST)_t;			match(_t,ALL);			_t = _t.getNextSibling();			break;		}		case EOF:		case PERIOD:		case IN_KW:		case NOPAUSE:		case Widget_ref:		{			{			_loop1947:			do {				if (_t==null) _t=ASTNULL;				if ((_t.getType()==Widget_ref)) {					gwidget(_t);					_t = _retTree;				}				else {					break _loop1947;				}							} while (true);			}			break;		}		default:		{			throw new NoViableAltException(_t);		}		}		}		{		if (_t==null) _t=ASTNULL;		switch ( _t.getType()) {		case NOPAUSE:		{			AST tmp1994_AST_in = (AST)_t;			match(_t,NOPAUSE);			_t = _t.getNextSibling();			break;		}		case EOF:		case PERIOD:		case IN_KW:		{			break;		}		default:		{			throw new NoViableAltException(_t);		}		}		}		{		if (_t==null) _t=ASTNULL;		switch ( _t.getType()) {		case IN_KW:		{			AST __t1950 = _t;			AST tmp1995_AST_in = (AST)_t;			match(_t,IN_KW);			_t = _t.getFirstChild();			AST tmp1996_AST_in = (AST)_t;			match(_t,WINDOW);			_t = _t.getNextSibling();			expression(_t);			_t = _retTree;			_t = __t1950;			_t = _t.getNextSibling();			break;		}		case EOF:		case PERIOD:		{			break;		}		default:		{			throw new NoViableAltException(_t);		}		}		}		state_end(_t);		_t = _retTree;		_t = __t1943;		_t = _t.getNextSibling();		_retTree = _t;	}