New returns an instance of errmon.ErrorMonitor which prints all the events through a given Logger.

NewEmitter returns a new instance of Emitter.

Default is an overridable function which returns an ErrorMonitor with the default configuration.

Emitter is an implementation of errmon.Emitter which just prints the events through a given Logger.

Option is an abstract option, which defines the behavior of an ErrorMonitor.

OptionCallerFrameFilter defines how to find the caller frame.