original_string: public function blank()
      {
          $message = ['%s is {{not|}} empty', $this->value];
          $this->assert((empty($this->value)), $message);
  
          return $this;
      }
code: public function blank()
      {
          $message = ['%s is {{not|}} empty', $this->value];
          $this->assert((empty($this->value)), $message);
  
          return $this;
      }
code_tokens: public function blank ( ) { $ message = [ '%s is {{not|}} empty' , $ this -> value ] ; $ this -> assert ( ( empty ( $ this -> value ) ) , $ message ) ; return $ this ; }
docstring: Assert that the value is empty.
  
  @throws AssertionFailureException
  
  @return self
docstring_tokens: Assert that the value is empty .