def is_attribute?
      info = attr_info
      if info
        read_or_write = name.to_s =~ /=$/ ? :write : :read
        info[read_or_write] ? true : false
      else
        false
      end
    end
def is_attribute?
      info = attr_info
      if info
        read_or_write = name.to_s =~ /=$/ ? :write : :read
        info[read_or_write] ? true : false
      else
        false
      end
    end
Tests if the object is defined as an attribute in the namespace
 @return [Boolean] whether the object is an attribute