public Builder setDatastore(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      datastore_ = value;
      bitField0_ |= 0x00000001;
      onChanged();
      return this;
    }
<pre>
Required. Fully-qualified Vertex AI Search data store resource ID.
Format:
`projects/{project}/locations/{location}/collections/{collection}/dataStores/{dataStore}`
</pre>

<code>string datastore = 1 [(.google.api.field_behavior) = REQUIRED];</code>

@param value The datastore to set.
@return This builder for chaining.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/VertexAISearch.java