Reimplements the :meth:`QSyntaxHighlighter.highlightBlock` method.

        :param block: Text block.
        :type block: QString

def highlightBlock(self, block):
        """
        Reimplements the :meth:`QSyntaxHighlighter.highlightBlock` method.

        :param block: Text block.
        :type block: QString
        """

        raise NotImplementedError("{0} | '{1}' must be implemented by '{2}' subclasses!".format(self.__class__.__name__,
                                                                                                self.highlightBlock.__name__,
                                                                                                self.__class__.__name__))