_t = __t342;
_t = __t346;
	public final void method_param_list(AST _t) throws RecognitionException {				AST method_param_list_AST_in = (_t == ASTNULL) ? null : (AST)_t;				AST __t342 = _t;		AST tmp1899_AST_in = (AST)_t;		match(_t,Method_param_list);		_t = _t.getFirstChild();		AST tmp1900_AST_in = (AST)_t;		match(_t,LEFTPAREN);		_t = _t.getNextSibling();		{		if (_t==null) _t=ASTNULL;		switch ( _t.getType()) {		case BUFFER:		case INPUT:		case INPUTOUTPUT:		case OUTPUT:		case PARAMETER:		{			parameter(_t);			_t = _retTree;			break;		}		case COMMA:		case RIGHTPAREN:		{			break;		}		default:		{			throw new NoViableAltException(_t);		}		}		}		{		_loop346:		do {			if (_t==null) _t=ASTNULL;			if ((_t.getType()==COMMA)) {				AST tmp1901_AST_in = (AST)_t;				match(_t,COMMA);				_t = _t.getNextSibling();				{				if (_t==null) _t=ASTNULL;				switch ( _t.getType()) {				case BUFFER:				case INPUT:				case INPUTOUTPUT:				case OUTPUT:				case PARAMETER:				{					parameter(_t);					_t = _retTree;					break;				}				case COMMA:				case RIGHTPAREN:				{					break;				}				default:				{					throw new NoViableAltException(_t);				}				}				}			}			else {				break _loop346;			}					} while (true);		}		AST tmp1902_AST_in = (AST)_t;		match(_t,RIGHTPAREN);		_t = _t.getNextSibling();		_t = __t342;		_t = _t.getNextSibling();		_retTree = _t;	}