Chain Reference
Returns a complete collection of chains recognized by the Rapid API. Chains represent a parent company which can have multiple brands associated with it. A brand can only be associated with one chain. For example, Hilton Worldwide is a chain that has multiple associated brands including Doubletree, Hampton Inn and Embassy Suites. The response is a JSON map where the key is the chain ID and the value is a chain object. Each chain object also contains a map of its related brands.