Zend/Gdata/Spreadsheets/CellQuery.php
public function setReturnEmpty($value)
    {
        if (is_bool($value)) {
            $this->_params['return-empty'] = ($value?'true':'false');
        } else if ($value != null) {
            $this->_params['return-empty'] = $value;
        } else {
            unset($this->_params['return-empty']);
        }
        return $this;
    }
public function setReturnEmpty($value)
    {
        if (is_bool($value)) {
            $this->_params['return-empty'] = ($value?'true':'false');
        } else if ($value != null) {
            $this->_params['return-empty'] = $value;
        } else {
            unset($this->_params['return-empty']);
        }
        return $this;
    }
public function setReturnEmpty ( $ value ) { if ( is_bool ( $ value ) ) { $ this -> _params [ 'return-empty' ] = ( $ value ? 'true' : 'false' ) ; } else if ( $ value != null ) { $ this -> _params [ 'return-empty' ] = $ value ; } else { unset ( $ this -> _params [ 'return-empty' ] ) ; } return $ this ; }
Sets the return-empty attribute for this query.

@param mixed $value String or bool value for whether to return empty cells
@return Zend_Gdata_Spreadsheets_CellQuery Provides a fluent interface
Sets the return - empty attribute for this query .