def is_cms_block?
      %w(page field collection).member?(self.class.to_s.demodulize.underscore.split(/_/).first)
    end
def is_cms_block?
      %w(page field collection).member?(self.class.to_s.demodulize.underscore.split(/_/).first)
    end
Checks if this tag is using Cms::Block