original_string: public function find($key)
      {
          if (isset($this->payload[$key])) {
              return $this->payload[$key];
          }
  
          return null;
      }
code: public function find($key)
      {
          if (isset($this->payload[$key])) {
              return $this->payload[$key];
          }
  
          return null;
      }
code_tokens: public function find ( $ key ) { if ( isset ( $ this -> payload [ $ key ] ) ) { return $ this -> payload [ $ key ] ; } return null ; }
docstring: Find a value from array with given key.
  
  @param $key
  
  @return mixed
docstring_tokens: Find a value from array with given key .