original_string: protected function getKeyName()
      {
          if (is_null($this->form)) {
              return;
          }
  
          return $this->form->model()->{$this->relationName}()->getRelated()->getKeyName();
      }
code: protected function getKeyName()
      {
          if (is_null($this->form)) {
              return;
          }
  
          return $this->form->model()->{$this->relationName}()->getRelated()->getKeyName();
      }
code_tokens: protected function getKeyName ( ) { if ( is_null ( $ this -> form ) ) { return ; } return $ this -> form -> model ( ) -> { $ this -> relationName } ( ) -> getRelated ( ) -> getKeyName ( ) ; }
docstring: Get the HasMany relation key name.
  
  @return string
docstring_tokens: Get the HasMany relation key name .