original_string: public function getPreviousPage()
      {
          return ($this->record)
              ? $this->getManifest()->getPreviousPage(
                  $this->record->getPath(),
                  $this->getEntity()->getPath()
              )
              : null;
      }
code: public function getPreviousPage()
      {
          return ($this->record)
              ? $this->getManifest()->getPreviousPage(
                  $this->record->getPath(),
                  $this->getEntity()->getPath()
              )
              : null;
      }
code_tokens: public function getPreviousPage ( ) { return ( $ this -> record ) ? $ this -> getManifest ( ) -> getPreviousPage ( $ this -> record -> getPath ( ) , $ this -> getEntity ( ) -> getPath ( ) ) : null ; }
docstring: Returns the previous page. Either returns the previous sibling or the
  parent of this page
  
  @return DocumentationPage|null
docstring_tokens: Returns the previous page . Either returns the previous sibling or the parent of this page