AST tmp743_AST_in = (AST)_t;
AST tmp747_AST_in = (AST)_t;
	public final void block_colon(AST _t) throws RecognitionException {				AST block_colon_AST_in = (_t == ASTNULL) ? null : (AST)_t;				if (_t==null) _t=ASTNULL;		switch ( _t.getType()) {		case LEXCOLON:		{			AST tmp743_AST_in = (AST)_t;			match(_t,LEXCOLON);			_t = _t.getNextSibling();			break;		}		case PERIOD:		{			AST tmp744_AST_in = (AST)_t;			match(_t,PERIOD);			_t = _t.getNextSibling();			break;		}		default:		{			throw new NoViableAltException(_t);		}		}		_retTree = _t;	}