original_string: public function setExtend($extendingSection, $extendedSection = null)
      {
          if ($extendedSection === null && isset($this->_extends[$extendingSection])) {
              unset($this->_extends[$extendingSection]);
          } else if ($extendedSection !== null) {
              $this->_extends[$extendingSection] = $extendedSection;
          }
      }
code: public function setExtend($extendingSection, $extendedSection = null)
      {
          if ($extendedSection === null && isset($this->_extends[$extendingSection])) {
              unset($this->_extends[$extendingSection]);
          } else if ($extendedSection !== null) {
              $this->_extends[$extendingSection] = $extendedSection;
          }
      }
code_tokens: public function setExtend ( $ extendingSection , $ extendedSection = null ) { if ( $ extendedSection === null && isset ( $ this -> _extends [ $ extendingSection ] ) ) { unset ( $ this -> _extends [ $ extendingSection ] ) ; } else if ( $ extendedSection !== null ) { $ this -> _extends [ $ extendingSection ] = $ extendedSection ; } }
docstring: Set an extend for Zend_Config_Writer
  
  @param  string $extendingSection
  @param  string $extendedSection
  @return void
docstring_tokens: Set an extend for Zend_Config_Writer