'Highlights the current fold scope.
:param block: Block that starts the current fold scope.'

def _highlight_block(self, block):

    scope = FoldScope(block)
    if ((self._current_scope is None) or (self._current_scope.get_range() != scope.get_range())):
        self._current_scope = scope
        self._clear_scope_decos()
        (start, end) = scope.get_range()
        if (not TextBlockHelper.is_collapsed(block)):
            self._decorate_block(start, end)
