# Functions
NewBackground creates a new context with a Background go ctx.
NewCancellable creates a new cancellable object.
NewNoOpCanncellable returns a no-op cancellable.
NewOptions returns a new Options object.
NewPool creates a new context pool.
NewWithGoContext creates a new context with the provided go ctx.
StartSampledTraceSpan starts a span that may or may not be sampled and will return whether it was sampled or not.
# Interfaces
Cancellable is an object that can be cancelled.
Context provides context to an operation.
Options controls knobs for context pooling.
Pool provides a pool for contexts.