@java.lang.Override
      public Builder clear() {
        super.clear();
        bitField0_ = 0;
        if (channelsBuilder_ == null) {
          channels_ = java.util.Collections.emptyList();
        } else {
          channels_ = null;
          channelsBuilder_.clear();
        }
        bitField0_ = (bitField0_ & ~0x00000001);
        apiKeyConfig_ = null;
        if (apiKeyConfigBuilder_ != null) {
          apiKeyConfigBuilder_.dispose();
          apiKeyConfigBuilder_ = null;
        }
        return this;
      }
<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