private void checkOk() throws RuntimeException {
    if (processException != null) {
      throw new RuntimeException("Failed to launch process", processException);
    }
  }
Wraps spawned {@link Process} to capture output and provide interaction with the process.

@since GemFire 4.1.1
geode-junit/src/main/java/org/apache/geode/test/process/ProcessWrapper.java