HasBatching returns if the given context has batching support.

NewIndex creates an index.

WithBatching adds batching support to the given context.

DefaultMaxDuration is the default MaxDuration for Func.

DefaultWaitInterval is the default WaitInterval for Func.

A Func transforms a function that takes a batch of inputs (Func.Many) into a function that takes single inputs (Func.Invoke).

Index is a "key" mapper for batch requests.