AST tmp1849_AST_in = (AST)_t;
AST tmp1853_AST_in = (AST)_t;
	public final void lockhow(AST _t) throws RecognitionException {				AST lockhow_AST_in = (_t == ASTNULL) ? null : (AST)_t;				if (_t==null) _t=ASTNULL;		switch ( _t.getType()) {		case SHARELOCK:		{			AST tmp1848_AST_in = (AST)_t;			match(_t,SHARELOCK);			_t = _t.getNextSibling();			break;		}		case EXCLUSIVELOCK:		{			AST tmp1849_AST_in = (AST)_t;			match(_t,EXCLUSIVELOCK);			_t = _t.getNextSibling();			break;		}		case NOLOCK:		{			AST tmp1850_AST_in = (AST)_t;			match(_t,NOLOCK);			_t = _t.getNextSibling();			break;		}		default:		{			throw new NoViableAltException(_t);		}		}		_retTree = _t;	}