1. A method implemented at least in part by a computer, the method comprising: receiving a first request regarding a virtual environment; in response to the first request, sending a second request for a representation of first data of a store, the second request conveyed in conjunction with a description that identifies a portion of the store; in response to the second request, receiving a token that represents second data logically stored in the portion of the store, the second data a subset, potentially a proper subset, of the first data, the token representing the second data as the second data existed when the token was bound to the second data; and providing the token together with information indicating to logically write third data via an offload provider, the third data a subset, potentially a proper subset, of the second data, at least one of the first, second, and third data to be retrieved from or stored in a virtual storage container.