public Builder mergeEndpoint(com.google.cloud.vertexai.api.Endpoint value) {
      if (endpointBuilder_ == null) {
        if (((bitField0_ & 0x00000001) != 0)
            && endpoint_ != null
            && endpoint_ != com.google.cloud.vertexai.api.Endpoint.getDefaultInstance()) {
          getEndpointBuilder().mergeFrom(value);
        } else {
          endpoint_ = value;
        }
      } else {
        endpointBuilder_.mergeFrom(value);
      }
      if (endpoint_ != null) {
        bitField0_ |= 0x00000001;
        onChanged();
      }
      return this;
    }
<pre>
Required. The Endpoint which replaces the resource on the server. Currently
we only support updating the `client_connection_config` field, all the
other fields' update will be blocked.
</pre>

<code>
.google.cloud.vertexai.v1.Endpoint endpoint = 1 [(.google.api.field_behavior) = REQUIRED];
</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/UpdateEndpointLongRunningRequest.java