package org.junit.internal.builders;
   
   import org.junit.runner.Runner;
   import org.junit.runners.BlockJUnit4ClassRunner;
   import org.junit.runners.model.RunnerBuilder;
   
   public class JUnit4Builder extends RunnerBuilder {
       @Override
       public Runner runnerForClass(Class<?> testClass) throws Throwable {
          return new BlockJUnit4ClassRunner(testClass);
      }
  }