code: public static Method[] methods(Class<?> clazz, String methodName, String... additionalMethodNames) {
          return Whitebox.getMethods(clazz, merge(methodName, additionalMethodNames));
      }
docs: Get an array of {@link Method}'s that matches the supplied list of method
  names. Both instance and static methods are taken into account.
  
  @param clazz
  The class that should contain the methods.
  @param methodName
  The name of the first method.
  @param additionalMethodNames
  Additional names of the methods that will be returned.
  @return An array of Method's. May be of length 0 but not
  {@code null}.
  @throws MethodNotFoundException
  If no method was found.