public class UnaryCallSettings<RequestT,ResponseT>
A base settings class to configure a UnaryCallable. An instance of UnaryCallSettings is not
sufficient on its own to construct a UnaryCallable; a concrete derived type is necessary.
This base class includes settings that are applicable to all calls, which currently is just
retry settings.
Retry configuration is composed of two parts: the retryable codes, and the retry settings. The
retryable codes indicate which codes cause a retry to occur, and the retry settings configure the
retry logic when the retry needs to happen. To turn off retries, set the retryable codes to the
empty set.
UnaryCallSettings contains a concrete builder class, UnaryCallSettings.Builder. This
builder class cannot be used to create an instance of UnaryCallSettings, because
UnaryCallSettings is an abstract class.
