code: func (j *JSONPath) evalBool(input []reflect.Value, node *BoolNode) ([]reflect.Value, error) {
  	result := make([]reflect.Value, len(input))
  	for i := range input {
  		result[i] = reflect.ValueOf(node.Value)
  	}
  	return result, nil
  }
docs: // evalBool evaluates BoolNode