public ClientType clientType() {
        return clientType;
    }
<p>{@link ClientType#PRODUCER} for {@link ConnectorType#SOURCE}
<p>{@link ClientType#CONSUMER} for {@link ConnectorType#SINK}
<p>{@link ClientType#PRODUCER} for DLQ in {@link ConnectorType#SINK}
<p>{@link ClientType#ADMIN} for DLQ Topic Creation in {@link ConnectorType#SINK}

@return enumeration specifying the client type that is being overridden by the worker; never null.
connect/api/src/main/java/org/apache/kafka/connect/connector/policy/ConnectorClientConfigRequest.java