Automattic\WooCommerce\Vendor\GraphQL\Type

Schema::isSubType │ public │ WC 1.0

Returns true if the given type is a sub type of the given abstract type.

Method of the class: Schema{}

No Hooks.

Returns

null. Nothing (null).

Usage

$Schema = new Schema();
$Schema->isSubType( $abstractType, $maybeSubType ): bool;
$abstractType(AbstractType&Type) (required)
.
$maybeSubType(ImplementingType&Type) (required)
.

Schema::isSubType() code WC 11.1.2

woocommerce/lib/packages/GraphQL/Type/Schema.php 
public function isSubType(AbstractType $abstractType, ImplementingType $maybeSubType): bool
{
    if ($abstractType instanceof InterfaceType) {
        return $maybeSubType->implementsInterface($abstractType);
    }

    assert($abstractType instanceof UnionType, 'only other option');

    return $abstractType->isPossibleType($maybeSubType);
}