Ruby on Rails

I see something like this:

require "ostruct"
class OptionsWrapper < OpenStruct
undef :id, :class

def [](key)
send(key)
end

def []=(key, value)
send("#{key}=", value)
end

def method_missing(method, *args, &block)
return @table.include?(method) ? @table.send(method) : nil if
%w(id class).include?(method.to_s)

@table.respond_to?(method) ? @table.send(method, *args, &block) :
super
end
end

I know OpenStruct is a class part of standard ruby library allowing
you to arbitrarily create methods on an object instance. I know that
undef allows you to set a method to nil. But I dont see why it is
needed in this case.

thanks for response

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