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// Package csm provides Client Side Monitoring (CSM) which enables sending metrics
// via UDP connection. Using the Start function will enable the reporting of
// metrics on a given port. If Start is called, with different parameters, again,
// a panic will occur.
//
// Pause can be called to pause any metrics publishing on a given port. Sessions
// that have had their handlers modified via InjectHandlers may still be used.
// However, the handlers will act as a no-op meaning no metrics will be published.
//
// Example:
// r, err := csm.Start("clientID", ":31000")
// if err != nil {
// panic(fmt.Errorf("failed starting CSM: %v", err))
// }
//
// sess, err := session.NewSession(&aws.Config{})
// if err != nil {
// panic(fmt.Errorf("failed loading session: %v", err))
// }
//
// r.InjectHandlers(&sess.Handlers)
//
// client := s3.New(sess)
// resp, err := client.GetObject(&s3.GetObjectInput{
// Bucket: aws.String("bucket"),
// Key: aws.String("key"),
// })
//
// // Will pause monitoring
// r.Pause()
// resp, err = client.GetObject(&s3.GetObjectInput{
// Bucket: aws.String("bucket"),
// Key: aws.String("key"),
// })
//
// // Resume monitoring
// r.Continue()
//
// Start returns a Reporter that is used to enable or disable monitoring. If
// access to the Reporter is required later, calling Get will return the Reporter
// singleton.
//
// Example:
// r := csm.Get()
// r.Continue()
package csm
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