kafka TestUtils createBrokerConfig issue

Trying to write a unit test case for Kafka, and stuck with strange
createBrokerConfig issue.
on TestUtils.createBrokerConfigs(1) it gives me compilation error

The method createBrokerConfigs(int, boolean) in the type TestUtils is
not applicable for the arguments (int)

When I looked into the scala source code, it contains only two methods:

createBrokerConfigs(int) //
https://github.com/apache/kafka/blob/0.8.1/core/src/test/scala/unit/kafka/utils/TestUtils.scala#L125
createBrokerConfigs(int, int)
//https://github.com/apache/kafka/blob/0.8.1/core/src/test/scala/unit/kafka/utils/TestUtils.scala#L137

Dont understand where this is coming from.