Add methods to decompose a RetryAlgorithm.

gax/src/main/java/com/google/api/gax/retrying/RetryAlgorithm.java

@@ -31,6 +31,7 @@
 
 import static com.google.common.base.Preconditions.checkNotNull;
 
+import com.google.api.core.BetaApi;
 import java.util.concurrent.CancellationException;
 
 /**
@@ -114,4 +115,14 @@ public boolean shouldRetry(
         && nextAttemptSettings != null
         && timedAlgorithm.shouldRetry(nextAttemptSettings);
   }
+
+  @BetaApi("Surface for inspecting the a RetryAlgorithm is not yet stable")
+  public ResultRetryAlgorithm<ResponseT> getResultAlgorithm() {
+    return resultAlgorithm;
+  }
+
+  @BetaApi("Surface for inspecting the a RetryAlgorithm is not yet stable")
+  public TimedRetryAlgorithm getTimedAlgorithm() {
+    return timedAlgorithm;
+  }
 }