core/src/main/java/com/twitter/elephantbird/util/Utils.java
public static Class<?> classForName(String className, ClassLoader classLoader) {
    try {
      return Class.forName(className, true, classLoader);
    } catch (ClassNotFoundException e) {
      throw new RuntimeException("failed to load class " + className, e);
    }
  }
public static Class<?> classForName(String className, ClassLoader classLoader) {
    try {
      return Class.forName(className, true, classLoader);
    } catch (ClassNotFoundException e) {
      throw new RuntimeException("failed to load class " + className, e);
    }
  }
returns Class.forName(className, true, classLoader). <br>
Throws a RuntimeExcepiton if the class is not found.

@see {@link Class#forName(String, boolean, ClassLoader)