original_string: public function addVariabilityOption(OptionInterface $variabilityOption)
      {
          if (!$this->hasVariabilityOption($variabilityOption)) {
              $this->variabilityOptions->add($variabilityOption);
          }
  
          return $this;
      }
code: public function addVariabilityOption(OptionInterface $variabilityOption)
      {
          if (!$this->hasVariabilityOption($variabilityOption)) {
              $this->variabilityOptions->add($variabilityOption);
          }
  
          return $this;
      }
code_tokens: public function addVariabilityOption ( OptionInterface $ variabilityOption ) { if ( ! $ this -> hasVariabilityOption ( $ variabilityOption ) ) { $ this -> variabilityOptions -> add ( $ variabilityOption ) ; } return $ this ; }
docstring: Adds a given variability option
  
  @param OptionInterface $variabilityOption
  
  @return $this
docstring_tokens: Adds a given variability option