Optional pageMaximum number of mappings that will be returned in a single response. If there are more mappings, the response will contain a field next_page_token that will allow you to retrieve them.
Optional pageA token that allows you to retrieve the next page of mappings. It should have the same value as the next_page_token-field you received in your last response.
The ID of the mapping definition. The ID is included in the response when you create a mapping definition, or when you retrieve a list of all your mapping definitions.