code: func Configure(options Options) (io.Closer, error) {
  	cfg := config.Configuration{
  		Disabled: options.Disabled,
  		Sampler: &config.SamplerConfig{
  			Type:  jaeger.SamplerTypeProbabilistic,
  			Param: options.Probability,
  		},
  	}
  
  	return cfg.InitGlobalTracer(options.ServiceName)
  }
docs: // Configure configures a global Jaeger tracer