def block
      page.blocks.detect{|b| b.identifier == self.identifier.to_s} || 
      page.blocks.build(:identifier => self.identifier.to_s)
    end
def block
      page.blocks.detect{|b| b.identifier == self.identifier.to_s} || 
      page.blocks.build(:identifier => self.identifier.to_s)
    end
Find or initialize Cms::Block object