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public function __wakeup() {
	if ( ! $this->registered_patterns ) {
		return;
	}
	if ( ! is_array( $this->registered_patterns ) ) {
		throw new UnexpectedValueException();
	}
	foreach ( $this->registered_patterns as $value ) {
		if ( ! is_array( $value ) ) {
			throw new UnexpectedValueException();
		}
	}
	$this->registered_patterns_outside_init = array();
}

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