original_string: public function getPaneCssClass($index = null, $label = null)
      {
          if (is_string($this->paneCssClass)) {
              return $this->paneCssClass;
          }
  
          if ($index !== null && isset($this->paneCssClass[$index])) {
              return $this->paneCssClass[$index];
          }
  
          if ($label !== null && isset($this->paneCssClass[$label])) {
              return $this->paneCssClass[$label];
          }
      }
code: public function getPaneCssClass($index = null, $label = null)
      {
          if (is_string($this->paneCssClass)) {
              return $this->paneCssClass;
          }
  
          if ($index !== null && isset($this->paneCssClass[$index])) {
              return $this->paneCssClass[$index];
          }
  
          if ($label !== null && isset($this->paneCssClass[$label])) {
              return $this->paneCssClass[$label];
          }
      }
code_tokens: public function getPaneCssClass ( $ index = null , $ label = null ) { if ( is_string ( $ this -> paneCssClass ) ) { return $ this -> paneCssClass ; } if ( $ index !== null && isset ( $ this -> paneCssClass [ $ index ] ) ) { return $ this -> paneCssClass [ $ index ] ; } if ( $ label !== null && isset ( $ this -> paneCssClass [ $ label ] ) ) { return $ this -> paneCssClass [ $ label ] ; } }
docstring: Returns a tab pane CSS class.
  @param string $index
  @param string $label
  @return string
docstring_tokens: Returns a tab pane CSS class .