def include?(attribute)
      return true if attribute.class == @target
      return true if attribute == link_field
      return true if methods.include? attribute
      false
    end
def include?(attribute)
      return true if attribute.class == @target
      return true if attribute == link_field
      return true if methods.include? attribute
      false
    end
Creates a new instance of an Association
 Returns true if the association includes an attribute that matches
 the provided string