feat: Adding new fields for concurrent explanations

PiperOrigin-RevId: 578251436

google/cloud/aiplatform/v1beta1/prediction_service.proto

@@ -304,6 +304,16 @@ message ExplainRequest {
   //  - Using different baselines for explaining the prediction results.
   ExplanationSpecOverride explanation_spec_override = 5;
 
+  // Optional. This field is the same as the one above, but supports multiple
+  // explanations to occur in parallel. The key can be any string. Each override
+  // will be run against the model, then its explanations will be grouped
+  // together.
+  //
+  // Note - these explanations are run **In Addition** to the default
+  // Explanation in the deployed model.
+  map<string, ExplanationSpecOverride> concurrent_explanation_spec_override = 6
+      [(google.api.field_behavior) = OPTIONAL];
+
   // If specified, this ExplainRequest will be served by the chosen
   // DeployedModel, overriding
   // [Endpoint.traffic_split][google.cloud.aiplatform.v1beta1.Endpoint.traffic_split].
@@ -313,6 +323,17 @@ message ExplainRequest {
 // Response message for
 // [PredictionService.Explain][google.cloud.aiplatform.v1beta1.PredictionService.Explain].
 message ExplainResponse {
+  // This message is a wrapper grouping Concurrent Explanations.
+  message ConcurrentExplanation {
+    // The explanations of the Model's
+    // [PredictResponse.predictions][google.cloud.aiplatform.v1beta1.PredictResponse.predictions].
+    //
+    // It has the same number of elements as
+    // [instances][google.cloud.aiplatform.v1beta1.ExplainRequest.instances] to
+    // be explained.
+    repeated Explanation explanations = 1;
+  }
+
   // The explanations of the Model's
   // [PredictResponse.predictions][google.cloud.aiplatform.v1beta1.PredictResponse.predictions].
   //
@@ -321,6 +342,10 @@ message ExplainResponse {
   // explained.
   repeated Explanation explanations = 1;
 
+  // This field stores the results of the explanations run in parallel with
+  // the default explanation strategy/method.
+  map<string, ConcurrentExplanation> concurrent_explanations = 4;
+
   // ID of the Endpoint's DeployedModel that served this explanation.
   string deployed_model_id = 2;