original_string: public function getFirst()
      {
          $this->internalDataListUpdate();
          if (isset($this->internalDataListData[0])) {
              return $this->internalDataListUpdateValueIfNeeded($this->internalDataListData, 0);
          }
          return null;
      }
code: public function getFirst()
      {
          $this->internalDataListUpdate();
          if (isset($this->internalDataListData[0])) {
              return $this->internalDataListUpdateValueIfNeeded($this->internalDataListData, 0);
          }
          return null;
      }
code_tokens: public function getFirst ( ) { $ this -> internalDataListUpdate ( ) ; if ( isset ( $ this -> internalDataListData [ 0 ] ) ) { return $ this -> internalDataListUpdateValueIfNeeded ( $ this -> internalDataListData , 0 ) ; } return null ; }
docstring: Returns the first object or null if not found.
  
  @return object|null The first object or null if not found.
  @throws \InvalidArgumentException
docstring_tokens: Returns the first object or null if not found .