$_attributes
$_attributes : array
Array of attributes that are passed in from the constructor, and made available in the view when a development error is displayed.
Exception class to be thrown when a datasource configuration is not found
__construct(string|array $message = '', integer|null $code = null, \Exception|null $previous = null)
Constructor.
Allows you to create exceptions that are treated as framework errors and disabled when debug = 0.
| string|array | $message | Either the string of the error message, or an array of attributes that are made available in the view, and sprintf()'d into Exception::$_messageTemplate  | 
                            
| integer|null | $code | The code of the error, is also the HTTP status code for the error.  | 
                            
| \Exception|null | $previous | the previous exception.  | 
                            
responseHeader(string|array|null $header = null, string|null $value = null) : array
Get/set the response header to be used
See also Cake\Http\Response::withHeader()
| string|array|null | $header | An array of header strings or a single header string 
  | 
                            
| string|null | $value | The header value.  | 
                            
<?php
/**
 * CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
 * @since         3.0.0
 * @license       https://opensource.org/licenses/mit-license.php MIT License
 */
namespace Cake\Datasource\Exception;
use Cake\Core\Exception\Exception;
/**
 * Exception class to be thrown when a datasource configuration is not found
 */
class MissingDatasourceConfigException extends Exception
{
    protected $_messageTemplate = 'The datasource configuration "%s" was not found.';
}