def bind(client)
      if self.class.const_defined?(:WithClient)
        mod = self.class.const_get(:WithClient)
      else
        mod = Page::WithClient
      end
      unless singleton_class.include?(mod)
        extend(mod)
      end
      self.client = client
      self
    end
def bind(client)
      if self.class.const_defined?(:WithClient)
        mod = self.class.const_get(:WithClient)
      else
        mod = Page::WithClient
      end
      unless singleton_class.include?(mod)
        extend(mod)
      end
      self.client = client
      self
    end
Bind +self+ to +client+
 @api private
 @return self