Automattic\WooCommerce\Vendor\GraphQL\Validator

DocumentValidator::getRule │ public static │ WC 1.0

Returns global validation rule by name.

Standard rules are named by class name, so example usage for such rules:

Method of the class: DocumentValidator{}

No Hooks.

Returns

null. Nothing (null).

Usage

$result = DocumentValidator::getRule( $name ): ?ValidationRule;
$name(string) (required)
.

DocumentValidator::getRule() code WC 10.9.1

woocommerce/lib/packages/GraphQL/Validator/DocumentValidator.php 
public static function getRule(string $name): ?ValidationRule
{
    return static::allRules()[$name] ?? null;
}