class IDL::OptionList::Option::Group::ParamSet::Configurator

def initialize(set)
  @set = set
end

def on_exec(&block)
  ext_klass = class << @set; self; end
  ext_klass.send(:define_method, :_exec, &block)
  ext_klass.send(:protected, :_exec)
end

def with(param, options = {})
  @set.define_params({param => options})
end

def without(*params)
  params.each { |p| @set.params.delete(p.to_sym) }
end