code: public void text(String expectedText) {
          String text = checkText(expectedText, 0, 0);
          assertNotNull(NO_ELEMENT_FOUND, text);
          assertFalse("Text found: element text of '" + text + CONTAINS + expectedText + "'", text.contains(expectedText));
      }
docs: Asserts that the element's text does not contain the provided expected
  text. 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 expectedText the expected text of the element