class Github::API

def define_singleton_method(method_name, content=Proc.new)
  (class << self; self; end).class_eval do
    undef_method(method_name) if method_defined?(method_name)
    if String === content
      class_eval("def #{method_name}() #{content}; end")
    else
      define_method(method_name, &content)
    end
  end
end