private void ensureChannelsIsMutable() {
        if (!((bitField0_ & 0x00000001) != 0)) {
          channels_ =
              new java.util.ArrayList<
                  com.google.cloud.vertexai.api.SlackSource.SlackChannels.SlackChannel>(channels_);
          bitField0_ |= 0x00000001;
        }
      }
<pre>
SlackChannels contains the Slack channels and corresponding access token.
</pre>

Protobuf type {@code google.cloud.vertexai.v1.SlackSource.SlackChannels}
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/SlackSource.java