GetProvider retrieves the provider from the context; panics if not found.

Snarf down all the keys from the get go.

SetProvider embeds a provider inside a Context, for later retrieval.

CloudDSProvider implements the DatastoreProvider interface using the cloud datastore API, for use outside of appengine environments.

Iterator is a batching iterator that executes the full query up front, to get a list of all keys; then it fetches pages of results as it works through the keys.

Query is a thin skin over the datastore query API.

Provider is a wrapper over the datastore APIs (cloud and appengine), so that client code (and in particular query assembley) can run both inside and outside of google appengine.

Keyer is a very thin wrapper.