# File lib/core/facets/module/instance_method.rb, line 18
  def instance_method!(s)
    #( @@__instance_methods__ ||= {} )[s] ||= instance_method(s)  # TODO: use class vars for 1.9+ ?
    #( @__instance_methods__ ||= {} )[s.to_sym] ||= instance_method(s.to_sym)
    $FIRST_CLASS_INSTANCE_METHODS[self][s.to_sym] ||= instance_method(s.to_sym)
  end