GetInfo returns information about currently executing activity.

GetLogger returns a logger that can be used in activity.

GetMetricsScope returns a metrics scope that can be used in activity.

RecordHeartbeat sends heartbeat for the currently executing activity If the activity is either cancelled (or) workflow/activity doesn't exist then we would cancel the context with error context.Canceled.

Register - calls RegisterWithOptions with default registration options.

RegisterWithOptions registers the activity function with options The user can use options to provide an external name for the activity or leave it empty if no external name is required.

ErrResultPending is returned from activity's implementation to indicate the activity is not completed when activity method returns.