original_string: protected function build_input($data, array $fields = [] ){
          return parent::build_input($data, $fields).$this->length_helper($data);
      }
code: protected function build_input($data, array $fields = [] ){
          return parent::build_input($data, $fields).$this->length_helper($data);
      }
code_tokens: protected function build_input ( $ data , array $ fields = [ ] ) { return parent :: build_input ( $ data , $ fields ) . $ this -> length_helper ( $ data ) ; }
docstring: Return input field
  
  @param mixed $data
  @param array $fields
  @return string
docstring_tokens: Return input field