--- private_methods
--- private_methods([inherited_too])    ruby 1.8 feature

    Υ֥ȤǤ private ᥽å̾ΰʸ
    ֤ޤ

    ruby 1.8 feature: Ǥ褦ˤʤޤ
    inherited_too Ǥ(ǥեȤϿ)ѡ饹
    줿᥽åɤоݤˤʤޤ

    Module#private_instance_methods [Module/private_instance_methods],
    ⻲ȤƤ

