5   var $_positions;  variable in CSSPropertyCollection
11     $this->_positions  = array();
35     $collection->_positions    = $this->_positions;
55     if (array_key_exists($code, $this->_positions)) {
56       $this->_properties[$this->_positions[$code]] = $property;
57       $this->_priorities[$this->_positions[$code]] = $this->_max_priority;
61       $this->_positions[$code] = count($this->_priorities)-1;
66     return isset($this->_positions[$code]);
87     if (!isset($this->_positions[$code])) { 
90     return $this->_properties[$this->_positions[$code]]->is_important();
94     if (!isset($this->_positions[$code])) {
99     if (!isset($this->_properties[$this->_positions[$code]])) {
104     $property =& $this->_properties[$this->_positions[$code]];
109     $this->_properties[$this->_positions[$code]]->set_value($value);