@automattic/calypso-products/src/is-domain-registration.ts

This module contains information about the various products sold within calypso, such as product slugs, plan intervals, etc.

export function isDomainRegistration( product: {
	is_domain_registration?: boolean;
	isDomainRegistration?: boolean;
} ): boolean {
	return !! ( product.is_domain_registration || product.isDomainRegistration );
}