NullMetric.php
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NullMetric.php
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	<?php
	/**
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License along
	* with this program; if not, write to the Free Software Foundation, Inc.,
	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
	* http://www.gnu.org/copyleft/gpl.html
	* @file
	*/

	declare( strict_types=1 );

	namespace Wikimedia\Stats\Metrics;

	/**
	* Null Metric Implementation
	*
	* When a request from cache yields a type other than what was requested
	* or an unrecoverable situation has occurred, an instance of this class
	* should be passed to the caller to provide an interface that suppresses
	* method calls against it.
	*
	* @author Cole White
	* @since 1.38
	*/
	class NullMetric {

	/**
	* Silently suppress all undefined method calls.
	*
	* @param $method_name string
	* @param $args array
	* @return NullMetric
	*/
	public function __call( string $method_name, array $args ): NullMetric {
	return $this;
	}

	}