code: public void clazz(String expectedClass) {
          String clazz = checkClazz(expectedClass, 0, 0);
          assertNotNull(NO_ELEMENT_FOUND, clazz);
          assertTrue("Class Mismatch: class of '" + clazz + DOES_NOT_CONTAIN + expectedClass + "'", clazz.contains(expectedClass));
      }
docs: Asserts that the element's class contains the provided expected class.
  If the element isn't present, this will constitute a failure, same as a
  mismatch. This information will be logged and recorded, with a screenshot
  for traceability and added debugging support.
  
  @param expectedClass - the expected class value