code: @NullSafe
    public static boolean equalsIgnoreCase(String stringOne, String stringTwo) {
      return stringOne != null && stringOne.equalsIgnoreCase(stringTwo);
    }
docs: Determines whether two String values are equal in value ignoring case and guarding against null values.
  
  @param stringOne the first String value in the case-insensitive equality comparison.
  @param stringTwo the second String value in the case-insensitive equality comparison.
  @return a boolean value indicating if the two String values are equal in value ignore case.
  @see java.lang.String#equalsIgnoreCase(String)