public static com.google.cloud.vertexai.api.RetrievalMetadata parseFrom(
      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
  }
<pre>
Optional. Score indicating how likely information from Google Search could
help answer the prompt. The score is in the range `[0, 1]`, where 0 is the
least likely and 1 is the most likely. This score is only populated when
Google Search grounding and dynamic retrieval is enabled. It will be
compared to the threshold to determine whether to trigger Google Search.
</pre>

<code>
float google_search_dynamic_retrieval_score = 2 [(.google.api.field_behavior) = OPTIONAL];
</code>

@return The googleSearchDynamicRetrievalScore.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/RetrievalMetadata.java